EP4166841A1 - Outdoor light with controllable ambient lighting - Google Patents

Abstract

The invention relates to an outdoor light 100, in particular a street light, for mounting vertically above a floor to illuminate the floor when the outdoor light 100 is in an operating state, the outdoor light 100 comprising a first light emitting device comprising a first light source group 10, a second light emitting device comprising a second light source group (20) and a control device for independently driving the light source groups 10, 20 to emit light in the operating state, wherein the first light emitting device in the operating state emits at least 90% of the light emitted therefrom downwards. In the operating state, the second light-emitting device emits at least 20%, in particular at least 30%, of the light it emits downwards and at least 30%, in particular at least 40%, upwards, with a maximum luminous flux that can be emitted by the first light-emitting device being at least three times as much , in particular at least five times, in particular at least ten times, the maximum luminous flux that can be emitted by the second light emitting device.

Description

The invention relates to an outdoor light, in particular a street light, according to the preamble of claim 1 and a set for realizing an outdoor light, an arrangement with several outdoor lights and a use of an outdoor light.

Generic outdoor lights are used to illuminate outdoor areas, such as streets or paths in parks. Such outdoor lights are usually mounted at a vertical distance above a floor, for example by being designed as a pole-mounted light and mounted on the spigot of a lamp pole or by being held vertically above the floor by a suspension, for example cable suspension, or by being used as a lighting module Lamp pillars are formed and are spaced vertically from the ground by the stele mast. The main lighting task of these lights is to illuminate the ground from which they are mounted at a distance, so that streets and sidewalks, for example, are sufficiently illuminated in the dark. In the past, light sources that radiated spherically in all directions, such as sodium vapor lamps, were mostly used for outdoor lighting. These outdoor lights bring the disadvantage of a significant Light pollution with it, since with such lights light is mostly emitted uncontrolled in the most varied of directions, so that the light is also emitted in those spatial angles in which no illumination of an object is necessary. With the increasing use of LED light sources, the possibilities for realizing outdoor lighting have changed. Since an LED comes close to an ideal point light source, lenses can be positioned in front of LEDs in order to specifically specify the beam angle. Therefore, to avoid light pollution, outdoor lights have been established in which each LED is assigned a lens that limits the area illuminated by the LED to a narrow angular range, for example to the area of a street that is to be illuminated by the outdoor light. Although such outdoor lights can prevent light pollution as far as possible, with increasing focus of the outdoor lights, ambient lighting is no longer guaranteed, which is disadvantageous for the sense of security of people in the vicinity of the outdoor light. In order to counteract this disadvantage, the most varied types of lenses have been created which ensure a fanning out of a beam angle, so that an outdoor light can also brighten up the surroundings in addition to its main lighting task. A modularity of the outdoor light, ie the adaptability of the outdoor light to an environment in which it is to be used, is thereby deteriorated and only possible at great expense by adapting the lenses used in each case, and the realization of an overall pleasantly perceived radiation characteristic of an outdoor light could be achieved with the hitherto known solutions can only be achieved inadequately. It should be noted that generic outdoor lights are used in environments that differ significantly from each other, for example on streets with different street widths and different building densities and in parks with different paths and park surroundings.

The present invention is based on the object of providing an outdoor light or a set for realizing an outdoor light or an arrangement of outdoor lights or a use of an outdoor light to at least partially remedy a disadvantage that arises with generic outdoor lights or their use to fix.

As a solution to the stated problem on which the invention is based, the invention proposes an outdoor lamp with the features according to claim 1 . The outdoor light according to the invention is designed for mounting vertically above a floor to illuminate the floor when the outdoor light is in an operating state. The operating state refers to the state of the exterior lamp in which the exterior lamp emits light and is intended to illuminate the ground when it is mounted at a distance from the ground in a vertical direction. The exterior lamp includes a first light emitting device comprising a first light source group and a second light emitting device comprising a second light source group. Each light source group includes a plurality of light sources, in particular a plurality of LEDs. All light sources are preferably designed as LEDs. The two light emitting devices preferably only have the light sources comprised by their respective light source groups, preferably the exterior light has exclusively the light sources comprised by the light emitting devices. The outdoor lamp also has a control device that is designed to independently control the light source groups to emit light in the operating state. The control device is designed to switch the light source groups on or off independently of one another and/or to dim the light source groups independently of one another, ie to change the luminous flux emitted by the respective light source group. The operating state describes such a state of the exterior light in which the control device controls both light emitting devices to emit light. In one embodiment, the luminous flux emitted by the first light emitting device and/or the luminous flux emitted by the second light emitting device can be changed by the control device in the operating state, in particular between a minimum luminous flux and a maximum luminous flux. The maximum luminous flux refers to the luminous flux that the respective light emitting device can emit as a maximum. For this purpose, the control device controls the respective light emitting device with its respective maximum intended nominal power. In addition to the light source groups they comprise, the light emitting devices can also include other components, for example optical elements such as a diffuser, at least one reflector and/or at least one lens. The first light emitting device is designed to emit at least 90% of the light emitted by it downwards in the operating state. In an embodiment in which the luminous flux emitted by the first light-emitting device can be changed by the control device, this preferably applies to any adjustable luminous flux. By the first light emitting device emits the essential part of the emitted light from her down, the first light emitting device can the essential Take over the lighting task of the outdoor light to illuminate the ground. The directional statement "down" is defined in that the radiated light rays run in a direction which runs at least with one component vertically, i.e. along a vertical direction, runs downwards, with reference to this vertical direction the outdoor light is intended to be arranged above a floor, so that when the outdoor light is arranged as intended, the light rays run at least with a vertical component from the outdoor light to the ground. According to the invention, the second light emitting device is designed to emit in the operating state at least 20%, in particular at least 30%, in particular at least 40%, of the light emitted by it downwards and at least 20%, in particular at least 30%, in particular at least 40% of the light emitted by it radiate light upwards. As explained above, the emission upwards or downwards is defined in that the emitted light rays have a directional component along the vertical direction upwards or downwards, with up and down indicating two opposite directions along the vertical direction. The second light emitting device is particularly preferably designed to emit a portion of the light emitted by it horizontally, ie without the light beams of this portion having a vertical component. The second light emitting device is preferably designed to emit at least 10%, in particular at least 20% of the light it emits with light beams whose vertical component is less than half, in particular less than a third, of the horizontal component. At this point it should be pointed out in general that the stated radiation properties of the first and second Light emitting device in preferred embodiments in which at least one of these light emitting devices is dimmable, ie the luminous flux emitted by it is variable, apply to all dimming states, ie to all adjustable luminous fluxes of the respective light emitting device.

The outdoor lamp according to the invention has significant advantages compared to the prior art. By providing two light emitting devices which emit light with a respective different light intensity distribution, each of the light emitting devices can be specifically adjusted for a specific purpose. Since the first light emitting device emits light essentially downwards, it fulfills the main lighting task of the exterior lamp, whereas the second light emitting device is designed in such a way that it emits a relevant portion of the light it emits upwards and downwards. The inventors have recognized that this allows the outdoor light to illuminate an environment in a way that is perceived as particularly pleasant and, moreover, can be easily adapted to different lighting tasks. Because the two light emitting devices can be controlled independently of one another and the second light emitting device also emits light upwards and downwards, targeted lateral brightening can be achieved independently of floor lighting, which is perceived as pleasant and at the same time avoids light pollution as far as possible. It has proven to be particularly advantageous to adapt the light emitting devices and the control devices to one another in such a way that a maximum of the light emitting device can be emitted by the first light emitting device Maximum luminous flux is at least three times, in particular at least five times, in particular at least ten times the maximum luminous flux that can be emitted by the second light emitting device. In this way, it can be ensured in a particularly advantageous manner that a high level of illumination can be achieved on a horizontally running floor, while discreet lateral brightening is made possible. It has been found to be generally advantageous to enable the second light emitting device to be controlled by the control device in such a way that the luminous flux emitted by the second light emitting device is at least between 50% and 100%, in particular between 30% and 100%, in particular between 10% and 100% of the maximum luminous flux can be changed, with preferably at least five, in particular at least ten different values of the luminous flux being adjustable in this range, preferably the value of the luminous flux being continuously variable over the entire range. It has also been found to be generally advantageous to enable the second light emitting device to be controlled by the control device in such a way that the light temperature of the luminous flux emitted by the second light emitting device, i.e. the light temperature of the emitted light, can be changed, in particular in a range from at least 3000 K to 4000 K, in particular in a range of at least 3000 K to 5000 K. The preferably provided controllability mentioned in each case not only allows the outdoor light to be adapted to a specific installation environment, but also makes it possible for the light emitted by the second light emitting device , ie the luminous flux and/or the light temperature can be varied depending on the time of day and/or the day. For example, to a first specific The luminous flux emitted by the second light emitting device at a certain time of day or on a certain day or at a certain time of day of a certain day is at least twice the luminous flux that the second light emitting device emits at a second certain time of day or day or time of day on a certain day , whereby it can be achieved that at the second time of day or day or time of day on a specific day the light pollution is reduced to the maximum, whereas at the first time of day or day or time of day on a specific day on which, for example, a significant use of the surroundings of the Outdoor light is expected by people, the most comprehensive possible illumination of the area can be guaranteed, and accordingly the light temperature of the emitted light can be varied, for example, depending on the time of day or day, in order to take time-dependent or day-dependent environmental conditions into account. It has proven particularly advantageous to set the day dependency as a dependency on a day of the week and/or as a dependency on the calendar day. By setting a weekday-dependent setting, brightening by the second light emitting device can be provided specifically on those weekdays with a greater luminous flux on which a larger number of people is typically expected in the vicinity of the outdoor light than on those weekdays on which a smaller number is typically expected to people around the outdoor light is expected. Correspondingly, by controlling the light temperature emitted by the second light emitting device as a function of the day of the week, certain requirements that are dependent on the day of the week can be taken into account. For example, on certain days of the week it may be necessary to be able to clearly see the surroundings, which makes a higher light temperature and thus a colder light more sensible than on other days of the week, when only a warm-white brightening that increases well-being is to be achieved with a low light temperature. Furthermore, it can be advantageous to set the luminous flux and/or light temperature as a function of the calendar day, in order to take account of circumstances that are dependent on the calendar day, for example the sunrise and sunset times as a function of the calendar day and/or the changes in the light temperature of natural daylight as a function of the time of day. The time of day determines a specific time within the 24 hours that a day lasts. The exterior light generally preferably has a light sensor which is designed to determine the light temperature and/or light intensity of the ambient light present in the vicinity of the exterior light. The design of such light sensors is known to those skilled in the art. Such light sensors are usually provided on an outside of the exterior light, for example on the lower and/or upper support section of the support body of the light, which is explained in more detail below, and/or on the cover of the light, so that the ambient light can be measured with a light sensor. Such light sensors are arranged in such a way that the light temperature and light intensity of the ambient light can be measured independently of the light emitted by the outdoor light itself. The control device is particularly preferably designed to read the light sensor and to set the light temperature and/or the luminous flux with which the second light emitting device emits the light emitted by it. The inventors have recognized that the separate provision of the second light emitting device, which is independent of the first light emitting device is controllable, enables a completely new functionality of the outdoor light. In this way, the second light emitting device, which is specifically responsible for brightening up the surroundings, whereas the floor is at least essentially illuminated by the first light emitting device, can be controlled in a targeted manner as a function of the ambient light present. Analog controllability of the luminous flux emitted by the first light emitting device and/or the light temperature emitted by it is generally preferred, whereby the advantage of the outdoor light according to the invention can also be used here that the illumination of the floor can be controlled independently of the second light emitting device the first light-emitting device can be adjusted in a particularly targeted manner depending on the time of day and/or the day. It has been found to be particularly advantageous that the exterior light includes a wireless and/or wired interface, by means of which the control device can be written to and/or read out or, in general, communication with the control device is made possible. In one embodiment, the light sensor is connected to the control device via the interface. The outdoor light preferably includes a radio module that is connected to the interface and via which the outdoor light can communicate wirelessly, for example with the light sensor and/or a central control unit and/or another outdoor light according to the invention. In one embodiment, the control device is designed to communicate via the interface with an identically designed exterior light and/or to communicate with a mobile end device, for example a smartphone. In general, the interface for wireless communication is particularly preferred, for example formed by means of Bluetooth, by means of WLAN and/or by means of Zigbee. Particularly preferably, the interface and control device are designed so that the control device can be programmed via a mobile terminal device using the interface in such a way that setpoint values, in particular setpoint values that are dependent on the time of day and/or day, for the light temperature and /or the luminous flux of the light to be emitted by the second light emitting device and in particular by the first light emitting device is undertaken.

In one embodiment, the light emitting devices are designed to emit light with a respective different spatial light intensity distribution body. The light intensity distribution body is a well-known definition of a spatial angle-dependent light intensity distribution of a light emitting device in lighting technology. A light source point is assigned to a light emitting device, which defines the zero point of the light intensity distribution body, the light intensity emitted by the light emitting device defining the upper side of the light intensity distribution body starting from this zero point as a function of the solid angle. The distance of the upper side from the light source point, ie from the zero point, at a defined solid angle thus indicates the light intensity with which the light emitting device emits light in this solid angle. The larger the volume of the light intensity distribution body, the larger the total luminous flux emitted by the light emitting device. The luminous flux corresponds to the space integral over the luminous intensity distribution body. Each of the two light emitting devices is thus assigned a light intensity distribution body, and each of the Light emitting devices are thus assigned a light source point that defines the zero point of the respective light intensity distribution body. According to a preferred embodiment, the light intensity distribution body of the first light emitting device is arranged with at least 90% of its body volume vertically below a horizontal plane running through its light source point, and the light intensity distribution body of the second light emitting device is at least 20%, in particular at least 30%, in particular at least 40%, of its body volume above a horizontal plane running through its light source point and with at least 20%, in particular at least 30%, in particular at least 40%, of its body volume below this horizontal plane. The light source points, which in concrete terms correspond to a starting point of their light emission assigned to the respective light emitting device, of the two light emitting devices are offset from one another in one embodiment, in particular spaced apart vertically. This is the case when the light emitting devices are spaced apart from one another with their surfaces from which they emit the light they emit, or are at least offset vertically relative to one another. The light intensity distribution body of the first light emitting device is particularly preferably at least three times as wide in a first vertical sectional plane as the light intensity distribution body of the second light emitting device and in a second sectional plane perpendicular to the first sectional plane is less than twice as wide, in particular narrower, than the light intensity distribution body of the second light emitting device. There they are Light intensity distribution bodies of the two light emitting devices are of course scaled identically, so that the distance between the top side of the light intensity distribution body and the light source point by a certain length describes a light intensity identically assigned to this certain length. Since the light intensity distribution body of the first light emitting device is significantly wider in the first vertical sectional plane than that of the second light emitting device, the first emitting device emits a high light intensity at a significantly wider opening angle than the second light emitting device with respect to this first vertical sectional plane. The inventors have recognized that a corresponding design of the light emitting devices, which is accompanied by a corresponding different design of the light intensity distribution bodies of the light emitting devices, is particularly advantageous. This is because the first light emitting device can be used to specifically perform a lighting task on the floor with a wide beam angle, whereas the second light emitting device can enable subtle lateral brightening. It must be taken into account here that the light intensity distribution body of a light emitting device can be adjusted by a targeted arrangement of the light sources and optical elements that are included in the respective light emitting device. By setting different shapes of the light intensity distribution bodies of the two light emitting devices, the different functions of the two light emitting devices can be met in a particularly advantageous manner. As explained, the exterior light is preferably designed in such a way that the radiation properties described of the light emitting devices, in particular in the described relationship to one another, is guaranteed with any adjustable dimming of the light emitting devices. At least, however, the described emission characteristics or relationships to one another, in particular with regard to the definition of the light intensity distribution bodies, are guaranteed in a maximum operating state of the exterior light, in which the control device controls the first and second light emitting devices to emit their respective maximum luminous flux. The light emitting devices are particularly preferably designed in such a way that in the maximum operating state the body volume of the light intensity distribution body of the first light emitting device is at least five times, in particular at least ten times the body volume of the light intensity distribution body of the second light emitting device. The light intensity distribution body of the second light emitting device can preferably be divided into two partial volumes by a vertical dividing plane, with each of the partial volumes being rotationally symmetrical with respect to a rotation about the The axis of rotation is and can be imaged axially symmetrically to the axis of rotation on a corresponding angular range of the respective other partial volume. By providing an angular range on both sides of the plane of division which is inherently rotationally symmetrical, a particularly uniform emission characteristic can be ensured on both sides of the plane of division. Because the angular ranges on both sides of the parting plane, which are each rotationally symmetrical, are axisymmetric with respect to the axis of rotation, the outdoor light can have a particularly ensure uniform ambient lighting on both sides of the division plane. The dividing plane can correspond to the above-mentioned first vertical sectional plane or the above-mentioned second vertical sectional plane.

In one embodiment, the light intensity distribution body of the second light emitting device is rotationally symmetrical overall about the axis of rotation. In the present case, rotational symmetry is assumed if, with any rotation about the axis of rotation, the light intensity in other beam angles changes by less than 20%, in particular less than 10%, starting from a maximum value of the light intensity in the rotationally symmetrical angular range. The axis of rotation preferably corresponds to a central vertical axis of the outdoor light. The central vertical axis of the outdoor light preferably runs through a horizontal center point of the outdoor light, in particular along the entire vertical extent of the outdoor light.

The first and second light emitting device are generally preferably designed such that the second light emitting device emits at least 10% of the light emitted by it in the operating state in the same solid angle that the first light emitting device completely illuminates. The complete illumination of the solid angle by the first light emitting device means that the first light emitting device emits light in every area of the solid angle. A particularly homogeneous appearance of the exterior light can be ensured by the corresponding overlapping of the solid angles illuminated by the light emitting devices. The first light-emitting device is generally preferred for emitting light with a different light temperature than the second Light emitter formed. The second light emitting device is preferably designed to emit light with a lower color temperature than the first light emitting device, so that the second light emitting device emits warmer light than the first light emitting device. Generally preferably, the second light emitting device is designed to emit warm white light and/or the first light emitting device is designed to emit cold white light. The inventors have recognized that due to the different lighting tasks that the first and second light emitting devices perform, the provision of different light temperatures is particularly advantageous, with the inventors in particular recognizing that a warmer light temperature can contribute in particular to brightening the surroundings as pleasantly as possible is perceived and as little light pollution as possible is generated. The control device is particularly preferably designed to change the light temperature of the light emitted by the second light emitting device. The light source group of the second light-emitting device preferably includes warm-white and cold-white LEDs, with the control device for dimming these warm-white and cold-white LEDs being designed to generate a mixed temperature, with the light temperature of the light emitted by the second light-emitting device being changeable by changing the dimming of warm-white and cold-white LEDs . The light temperature of the light emitted by the second light emitting device can preferably be changed by the control device at least between 3000 k and 4000 k, in particular at least between 2700 k and 4000 k, preferably at least between 2700 k and 5000 k. By providing a wide light temperature range, the Radiation characteristics of the outdoor light can be adapted to a wide variety of environmental conditions in a particularly advantageous manner.

In one embodiment, the second light source group, which is comprised by the second light emitting device, has a plurality of subgroups, each subgroup comprising at least one light source of the second light source group. The subgroups can be controlled independently of one another. Different subgroups are generally preferably designed to illuminate a different solid angle range. The control device is preferably designed to set a solid angle range in which the second light emitting device emits light by, depending on the selected angular range to be illuminated, controlling a selection of subgroups assigned to this selected angular range for emitting light. The control device is therefore preferably designed to only select a selection of the subgroups of the second light source group in a partial operating state of the exterior lights in which the second light emitting device only illuminates part of the solid angle that it illuminates when all of its light sources are activated to emit light to be driven to emit light. In a particularly preferred embodiment, each subgroup includes at least one warm white and at least one cool white LED. In the present case, a warm white LED refers to an LED that emits light with a light temperature of less than 3400 K, and a cool white LED refers to an LED that emits light with a light temperature of more than 3400 K, in particular between 3400 K and 5500 K . Each subgroup can thus be designed to illuminate a specific solid angle assigned to it, in particular by means of an optical element or a lens assigned to it. optical elements that are included in the second light-emitting device, with light being able to be emitted in this solid angle by means of the subgroup with a light temperature that results from the mixture of the light emitted by the two LEDs, with the two LEDs in the subgroup preferably being controllable independently of one another so that the light temperature can be adjusted by dimming the two LEDs of the subgroup differently.

In one embodiment, the second light emitting device is designed to cover a first angular range, which extends from 70° to 110°, in particular from 60° to 120°, to a first vertical axis and lies in a first sectional plane, uniformly with a first light intensity assigned to it to illuminate. The first vertical sectional plane preferably corresponds to the first vertical sectional plane explained above, and the vertical axis preferably corresponds to the central vertical axis of the exterior lamp explained above. Uniform illumination of the entire angular range with a first light intensity, with the uniform illumination meaning a variation in the luminous intensity, based on a maximum luminous intensity emitted in the angular range, of a maximum of 20%, in particular a maximum of 10%, can be particularly advantageous for light-reduced brightening of an environment . The second light-emitting device is preferably designed to uniformly illuminate such an angular range on both sides of the vertical axis with the first light intensity assigned to it. The angular range thus extends in the first vertical section plane and over an angle of 70° to 110°, in particular from 60° to 120° to the vertical axis on one side of the vertical axis in this first vertical cutting plane. The angular range is preferably distributed symmetrically around a first horizontal axis lying in the vertical sectional plane and intersecting the vertical axis, preferably correspondingly covering an angle to this first horizontal axis of -20° to +20°, in particular -30° to +30°. In one embodiment, which can preferably be combined with the aforementioned one, the second light-emitting device is designed to cover a second angular range, which extends from 70° to 110°, in particular from 60° to 120°, to the vertical axis mentioned and in a direction perpendicular to the first vertical sectional plane running through the vertical axis second vertical sectional plane is to illuminate uniformly with a second light intensity assigned to it. The uniform illumination can be provided analogously to the first angular range. The first and second vertical section planes can correspond to the above definition. Analogously to the first angular range explained, the second angular range can extend symmetrically on both sides of a second horizontal axis, which runs perpendicular to the vertical axis and lies in the second vertical sectional plane, thus preferably from -20° to +20°, in particular -30° to +30 ° around this second horizontal axis. Such an angular range is preferably provided on both sides of the horizontal axis in the second vertical sectional plane. In a combination of the aforementioned advantageous embodiment, the second light emitting device can ensure particularly uniform brightening. The first light intensity particularly preferably deviates from the second light intensity by less than 30%, in particular by less than 20%. This has the advantage that in both horizontal directions, ie both in the first vertical sectional plane and in the second vertical sectional plane, an essentially the same Luminous intensity radiation takes place. The vertical axis generally preferably runs through the light source points of the first and second light emitting devices, the light source points relating to the definition of the light intensity distribution body of the light emitting devices.

In one embodiment, the first light emitting device is designed to evenly divide a main angular range assigned to it, which extends from 40° to 60°, in particular from 35° to 65°, to a vertical axis and lies in a first vertical sectional plane with a first Illuminate light intensity, preferably on both sides of the vertical axis in the first vertical section plane. The uniform illumination of the main angular range can be configured analogously to the angular ranges in the advantageous exemplary embodiment described above with regard to the uniform light emission of the second light emitting device. Correspondingly, this main angular range can also be designed symmetrically about a corresponding first horizontal axis. The first vertical sectional plane preferably corresponds to the first vertical sectional plane explained with reference to the uniform emission of the second light emitting device in the preferred exemplary embodiment explained above. The first light emitting device is particularly preferably designed to continuously emit less than half, in particular less than a quarter of the first light intensity assigned to it in a second sectional plane running perpendicularly to the first sectional plane through the vertical axis. Correspondingly, the first light-emitting device can advantageously be designed to emit only one light in a horizontal direction emit a significant proportion of the light emitted by it. The first and second sectional planes as well as the vertical axis preferably correspond to the definitions provided above with reference to the preferred exemplary embodiment relating to a uniform emission of light by the second light emitting device. The first light emitting device is particularly preferably designed to emit light in the first vertical section plane over an angular range that is at least three times the width of an angular range over which the first light emitting device emits light in the second vertical section plane. This can be particularly advantageous for the targeted asymmetrical configuration of the illumination characteristic of the first light emitting device, which can be particularly advantageous in particular for illuminating streets.

In one embodiment, the first light emitting device is designed to, in the operating state, cover a horizontally running floor area which is spaced 3.5 m along a vertical straight line from a reference point located within the exterior light and which is spaced 1 m from the reference point along a first horizontal straight line and extends 2 m along the first horizontal straight line and extends 1 m along a second horizontal straight line perpendicular to the first, shall be continuously illuminated with an illuminance of between 30 lux and 60 lux. In one embodiment that can be combined particularly advantageously with the aforementioned embodiment, the second light-emitting device is designed to, in the operating state, have a vertically extending wall area which is 2.5 m from the along the second horizontal straight line reference point and extending along the vertical straight line for 1 m on either side of the reference point and along the first horizontal straight line for 2 m on either side of the reference point, shall be continuously illuminated with an illuminance of between 1.5 lux and 3.5 lux . The outdoor light is thus designed so that in the operating state the control device selectively activates the light emitting devices so that the first light emitting device illuminates a horizontal floor area and the second light emitting device homogeneously illuminates a vertical wall area, with the floor area being spaced vertically from the reference point in the outdoor light and the wall area is horizontally spaced from the reference point located in the outdoor lamp. The reference point can be the spatial center point of the light source arrangement, which is formed by all the light sources of the first and second light source groups. In a particularly preferred embodiment, the homogeneous illumination takes place over a floor area that extends along the first horizontal straight line over 3 m and along the second horizontal straight line over 1.5 m, in particular over 1 m on each side of the reference point, and the homogeneous illumination takes place over a wall area which extends along the vertical straight line over 2 m on both sides of the reference point and over 3 m along the first horizontal straight line on both sides of the reference point. The extension with reference to a straight line relative to a reference point describes the extension along this straight line relative to the reference point, it being possible for this extension to be at a distance from the reference point in directions perpendicular to the respective straight line. The inventors have recognized that the realization of an operating state in which a wall area through the second light emitting device is irradiated with a significantly lower illuminance that is homogeneous in the area mentioned, and in which the floor area is irradiated with a significantly greater illuminance and homogeneously in the area mentioned, is particularly advantageous for the optimal realization of a lighting task.

In one embodiment, the light-emitting devices each have a light-emitting surface from which they emit the light they emit. The light-emitting surfaces of the light-emitting devices can each be closed without interruption or have different surface sections. The light-emitting surface defines the entire surface over which the light-emitting device emits the light it emits in the operating state, in particular in the maximum operating state explained above. The light-emitting surface can be an uninterrupted closed surface or have a plurality of surface sections spaced apart from one another. The light-emitting surfaces of the light-emitting devices are preferably offset vertically with respect to one another, in particular at a vertical distance from one another. The displacement relates to the center of the area of the respective light-emitting surface. The light-emitting surface of the second light-emitting device is particularly preferably arranged below the light-emitting surface of the first light-emitting device. The inventors have surprisingly found that the arrangement of the light-emitting surface of the second light-emitting device below the light-emitting surface of the first light-emitting device is particularly advantageous, even if the first light-emitting device is designed to emit downwards. The inventors have surprising found that the provision of the light-emitting surface of the second light-emitting device below the light-emitting surface of the first light-emitting device only impedes the emission of light by the first light-emitting device to an insignificant extent and at the same time can advantageously enable homogeneous lateral illumination of the area surrounding the outdoor light.

In one embodiment, the exterior lamp comprises a supporting body which comprises an upper supporting section and a lower supporting section as well as a connecting section connecting them. The connecting section thus runs in the vertical direction between the two support sections. The light-emitting surface of the first light-emitting device is preferably arranged on the upper support section and the light-emitting surface of the second light-emitting device is arranged on the lower support section. The two support sections are thus designed to hold the light-emitting surface and thus the body forming the light-emitting surface at a fixed position. Since the position of the light-emitting surfaces is defined offset vertically with respect to one another by the support sections, a particularly simple and precise specification of the light emission characteristics of the exterior lamp can be provided. The connecting section particularly preferably comprises a tube element which forms a surface of the connecting section running between the support sections, electrical lines preferably running between the support sections within the tube element. The tubular element can thus on the one hand ensure optical concealment of the electrical lines, and on the other hand the tubular element can optically connect the support sections and thereby preferably also the light-emitting surfaces to one another. Preferred the supporting body comprises a rod-like connecting part running inside the tubular element, which keeps the supporting sections positioned relative to one another and which is covered by the tubular element. Electrical lines preferably run vertically between the support sections and are arranged horizontally between the connecting part and the tubular element. For this purpose, between the rod-like connecting part and the tube element, a hollow space is preferably formed which runs uninterruptedly between the support sections and is continuously enclosed by the tube element.

In one embodiment, the second light emitting device has a light emitting body which has a surface over which the second light emitting device emits the light emitted by it. The surface of the light-emitting body preferably corresponds to the light-emitting surface of the second light-emitting device explained above. The surface of the light-emitting body preferably extends over a vertical height of at least 2 cm, in particular at least 3 cm. The inventors have recognized that the provision of a light-emitting body with a correspondingly long vertical surface over which the second light-emitting device emits light is particularly advantageous for the uniform illumination of an environment. The surface of the light-emitting body is particularly preferably designed to run around a central vertical axis of the exterior light. The central vertical axis preferably corresponds to the central vertical axis explained above. The second light emitter emits light at each surface point of the surface of the light emitter. The surface of the light emitter can be continuously closed or comprise several surface sections. The surface is particularly preferably designed to be diffusely scattering and/or reflective. In general, the second light-emitting device preferably emits light into an area surrounding the exterior light exclusively starting from the surface of the light-emitting body. In one embodiment, the light source group of the second light emitting device is arranged within the light emitting body and is designed to emit light through the surface of the light emitting body. In one embodiment, the light source group of the second light emitting device is arranged offset vertically to the light emitting body and is designed to illuminate the surface of the light emitting body, with the light emitting body being configured as a reflector, the light emitted by the light sources for illuminating the surface being reflected by the surface and with the Configuration of the light-emitting body as a light guide, the light is coupled into the light-emitting body at the surface and is coupled out at another point on the light-emitting body. For example, the light-emitting body can be designed as a light guide with a vertical extension, with light being coupled into the light guide, in particular on a vertical side, ie at an upper or lower end, and being coupled out over a vertical area of the light guide. In this vertical extension area, the light guide preferably has a coupling-out structure designed for coupling out the light. In one embodiment, the tube element discussed above is formed as the light guide. The light guide can, for example, have a cylindrical, truncated cone-like or trumpet-like shape, with its axis preferably being aligned with the explained central vertical axis of the outdoor light coincides. The light sources of the second light source group are preferably arranged on the upper support section and radiate light from there into an upper end of the light guide, with the light guide emitting the coupled light over a vertical extension area with at least one horizontal component, in particular in the advantageous angular areas explained. Arranging the light sources within the light-emitting body can enable a particularly optically advantageous configuration of the exterior light, whereas arranging the light sources offset vertically with respect to the light-emitting body can enable a particularly flexible arrangement of the light sources. In one embodiment, the light-emitting body is designed in the manner of a cylinder or in the manner of a truncated cone, with the light sources being arranged within the cylinder or truncated cone and the truncated cone being formed from a diffusely scattering material, so that the surface of the cylinder or truncated cone and thus the surface of the light-emitting body is designed to be diffusely scattering. In one embodiment, the light-emitting body is designed as a reflector, in particular as a truncated and/or faceted reflector, so that it has a reflective surface that is irradiated by the light sources and from which the second light-emitting device emits light into the environment.

In one embodiment, the second light-emitting device comprises a reflector, which is preferably designed in the manner of a truncated cone or trumpet, in particular in a rotationally symmetrical manner, with the light sources of the second light source group being spaced vertically from the reflector. In this case, the light sources of the second light source group are preferably emitters formed, which are vertically spaced from the reflector and irradiate them. Both the light sources of the first light source group and the light sources of the second light source group are preferably arranged on the upper support section of the support body and held by it. Particularly preferably, the light sources of the second light source group are distributed uniformly around a central vertical axis of the exterior lamp, so that they can irradiate the reflector evenly, so that light can be radiated evenly in all directions starting from the reflector. In one embodiment, the reflector is the light-emitting body explained above; in one embodiment, the second light-emitting device comprises a diffuser that surrounds the reflector and through which at least 80% of the light emitted by the reflector passes before it reaches the surroundings of the exterior lamp. The second light emitting device is preferably designed in such a way, i.e. its light sources are arranged in relation to the reflector, that at least 80%, in particular at least 90% of the light emitted by the light sources of the second light source group only reaches the cover after it has previously been reflected on the reflector. Thus, the light sources of the second light source group are configured with their opening angle specifically matched to the surface of the reflector in such a way that they essentially only irradiate the surface of the reflector. The light sources are preferably designed as emitters, which comprise a emitter tube, at one end of which at least one LED is arranged and at the other end of which light exits for emitting light and from there impinges on the reflector of the second light emitting device. The inside of the radiator tube is preferably designed as a reflector and/or designed in the manner of a cone. Preferred the emitter tube extends vertically between its ends so that the at least one LED of the light source, ie the emitter, is spaced vertically through the emitter tube to the end of the emitter tube from which light emerges to be emitted onto the reflector. This can have the particular advantage that the at least one LED cannot be seen from the outside when the outdoor light is in operation, since it is covered by the emitter tube, whereas the emitter tube simultaneously ensures that the light is sufficiently focused onto the reflector of the second light-emitting device can.

In one embodiment, the second light emitting device has a reflector and a diffuser in addition to the second light source group. The second light emitting device is designed to emit at least 80%, in particular at least 90%, in particular all of the light emitted by it by means of the diffuser. Particularly preferably, at least 50% of the light emitted by the diffuser, originating from light sources of the light source group of the second light emitting device, reaches the diffuser only after it has been reflected at the reflector. The reflector is thus arranged relative to the diffuser and the light sources of the second light source group in such a way that a significant proportion of the light emitted by the light sources is first reflected by the reflector before it reaches the diffuser and is emitted by it. The diffuser is preferably the light-emitting body explained above. The reflector is particularly preferably arranged at least in sections and the light source group is arranged completely inside the diffuser. The light sources of the second light source group are particularly preferably arranged around a central vertical axis of the outdoor light distributed on a horizontal support. The central vertical axis preferably corresponds to the central vertical axis explained above. The horizontal support is preferably arranged on the lower or upper support section of the support body and is thus held by it. The reflector preferably extends, starting from a reflector section that is vertically opposite the carrier and covers the light sources of the second light source group horizontally, tapering towards the carrier on which the light sources of the light source group are arranged. The reflector thus comprises, on the one hand, the aforementioned reflector section, which lies vertically opposite the carrier, and, on the other hand, a further reflector section which, starting from the reflector section, tapers conically and extends towards the carrier. The reflector is preferably held on the carrier and/or on the carrier section of the carrier body that carries the carrier. Particularly preferably, the diffuser extends around the second light source group from the carrier vertically towards the reflector section. The diffuser preferably covers the entire vertical distance between the support and the reflector section which is vertically opposite the support. The diffuser preferably encloses the further reflector section, which extends conically from the reflector section to the carrier, in an uninterrupted closed manner. The special arrangement of reflector and diffuser makes it possible to achieve particularly well-mixed lighting that is emitted homogeneously into the surroundings.

In one embodiment, the outdoor light includes a light-permeable cover that delimits an interior space of the outdoor light, in which the light source groups of the light emitting devices are arranged. are preferred the light emitting devices are arranged as a whole in this interior space. The interior is preferably sealed off from the surroundings of the exterior light, in particular at least in accordance with IP64, in particular at least in accordance with IP66. In the operating state of the outdoor lamp, the light source groups emit light from the interior onto the cover to illuminate a vicinity of the outdoor lamp. The light emitted by the light sources thus passes through the cover so that the surroundings are illuminated. The cover can include optical elements that are assigned to at least one of the light emitting devices, or can be formed separately from the light emitting devices. The cover preferably encloses the interior space in an uninterrupted manner around a central vertical axis of the exterior lamp. The cover is preferably translucent, in particular transparent or translucent, over its entire extent. The outdoor lamp particularly preferably comprises an opaque cover which is arranged above the cover and completely covers the cover horizontally, with the second light emitting device emitting at least 20%, in particular at least 30% of the light emitted by it above the cover in the operating state. The particularly advantageous embodiment described has the advantage that the cover represents a defined delimitation of the outdoor light, which is also optically perceptible, whereas the targeted arrangement of the second light emitting device means that, despite the provision of the opaque cover, lateral brightening also occurs above the Lid can be done. The inventors have recognized that this configuration is made possible in a particularly advantageous manner by the provision of two separate light-emitting devices, with the Light emission surface of the second light emitting device is arranged below the light emission surface of the first light emitting device.

In an embodiment in which the outdoor lamp comprises the support body explained above and a tubular element is provided, the tubular element preferably has the same shape profile on its outside as the cover. For example, the cover and tube elements can each be designed in the manner of a trumpet, a spherical segment or a cylinder. By providing a corresponding shape of tube element and cover, a homogeneous irradiation of the cover can be made possible particularly advantageously when light emitting devices are provided with their light emission surfaces on the upper and lower support section.

In one embodiment, the lower end of the supporting body of the outdoor light forms a mast extension for mounting on a mast spigot. This can particularly simplify the mountability of the outdoor light. The mast attachment can be designed, for example, in the manner of a cone or cylinder in order to be placed on a corresponding cone-like or cylinder-like mast spigot. The mast attachment preferably has fastening devices, such as screws, by means of which the mast attachment can be fixed in position and permanently on the mast spigot. In one embodiment, the exterior light is designed as a light module of a light column. A light stele usually has a stele mast, which is designed for attachment to a floor and extends vertically upwards from the floor. With such a light column, the outdoor light according to the invention, which is designed as a light module of the light column, can, for example, typically be held at a distance of more than 3 m, in particular more than 4 m, in particular more than 5 m, vertically spaced above the ground and supported by the stele mast. The light column is preferably designed in the manner of a cylinder over at least 70%, in particular at least 80% of its vertical extent, in particular over its entire vertical extent. The exterior lamp is preferably designed in the manner of a cylinder. In one embodiment, the outdoor light designed as a light module of the light pedestal is designed in such a way that its support body has fastening devices that correspond to one another on its underside and on its upper side. By providing these corresponding fastening devices, the outdoor light designed as a lighting module of a light pillar can have a particularly high degree of modularity, since it can be arranged vertically between two other sections of the light pillar and connected to them, with the section arranged below it having a fastening device on its upper side, which is designed to correspond to the fastening device provided on its underside, and wherein the section of the lighting column provided above it has a fastening device on its underside, which is designed to correspond to the fastening device provided on its upper side. Particularly preferably, the pillar has a fastening device on its upper side, which is designed to correspond to the fastening device that is provided on the underside of the outdoor light. The fastening devices that correspond to one another can be formed, for example, in that an end plate is provided at the upper end and at the lower end of the outdoor light, in which through-holes are provided, with through Arranging the end plates one above the other and arranging the through-holes in alignment with one another, the two end plates can be screwed together when two identical outdoor lights are arranged one above the other. In a particularly preferred embodiment, the fastening device provided on the underside of the outdoor lamp has a coil-shaped connecting element which has an upper flange, a lower flange and a connecting section, the upper flange being spaced vertically from the lower flange by the connecting section and the connecting section being upper and lower flange connects to each other. The connecting section has a smaller diameter, ie a smaller extent perpendicular to the vertical direction, than the two flanges. The outdoor lamp particularly preferably comprises a tubular housing in which a light exit opening, in particular a horizontally closed circumferential light exit opening, is provided, which is preferably closed by the above-mentioned translucent cover, which is preferably designed in the manner of a cylinder or hollow cylinder. Preferably, the upper flange is arranged on and connected to an inside of the tubular housing, whereas the lower flange extends vertically downwards beyond the housing. The corresponding upper fastening device is preferably designed as a projection, in particular as a flange-like projection, on the inside of the tubular housing offset downwards towards the upper vertical end of the housing. In an arrangement of the outdoor lamp designed as a lighting module of a lighting column on a correspondingly designed fastening device of a section of the lighting column that is arranged below it, the lower flange of the lower fastening device be easily mounted on the corresponding fastening device. Due to the provision of the connecting section, the fastening device provided on the underside of the exterior lamp can be particularly easily accessible, for example to enable a screw to be screwed into the projection provided on the section underneath. In a further embodiment, in which the outdoor light is designed as a light module of a light column, the outdoor light can also have two housing sections, with the first light emitting device being arranged in a first housing section and the second light emitting device being arranged in a second housing section. At least one of the housing sections preferably has fastening devices on its upper side and on its lower side which correspond to one another and which can be designed as explained above. With such an outdoor light, a light of a light column is preferably realized in which the housing section of the outdoor light in which the first light emitting device is arranged is arranged vertically above the housing section in which the second light emitting device is arranged. The housing section, in which the second light-emitting device is arranged, preferably has fastening devices that correspond to one another on its upper side and its lower side. The housing section in which the first light-emitting device is arranged is preferably designed as a light head, which preferably forms the vertically uppermost section of the light pillar. The light column can include additional modules, in particular modules arranged between the two housing sections of the exterior light, such as a camera module, a radio module, etc.

In general, the exterior lamp preferably has a continuous interior space that is circumferentially enclosed by the cover of the lamp, with both the light source group of the first light emitting device and the light source group of the second light emitting device emitting their light into this interior space and the light from this interior space through the cover is delivered as intended. The cover preferably closes a light exit opening of the outdoor light, which runs uninterrupted in the vertical direction from the lower support section to the upper support section of the outdoor light. Preferably, the light exit opening runs continuously around a central vertical axis of the exterior lamp over its vertical extension and is closed without interruption by the cover. The cover preferably runs uninterruptedly from the lower support section to the upper support section and is continuously translucent over its entire extent. A configuration of this type can produce a particularly homogeneous emission of the outdoor light, both with regard to the radiation by the first light-emitting device and with regard to the radiation by the second light-emitting device, and such a configuration can make the outdoor light particularly pleasant to see optically be realised.

In one embodiment, each light source in the first light source group is assigned a lens, with the light sources in the first light source group radiating any light they emit from the lens assigned to them directly onto the cover of the exterior lamp. As a result, a targeted emission characteristic of the first light emitting device be specified particularly advantageous and simple. In one embodiment, the light sources of the second light source group radiate at least 80% of the light they emit through a diffuser that surrounds them to cover the outdoor light, through which the light they emit is then emitted into the area surrounding the outdoor light. By assigning a common diffuser to the light sources of the second light source group, mixing of the light emitted by the light sources and lateral brightening, which is pleasant for an observer, can be produced in a particularly advantageous manner.

The invention also relates to a set for realizing an outdoor light according to the invention. The set has a supporting body, a first light-emitting device, a second light-emitting device and a cover, in particular a lid. The set is designed to implement a first outdoor lamp, the light sources of which are designed exclusively by the first light emitting device. This first outdoor light is therefore not designed as an outdoor light according to the invention. The set is also designed to implement a second outdoor light, the light sources of which are formed by the first and the second light emitting device. The set thus includes a set of components comprising at least the second light emitting device, with the use of this set of components being possible to implement an outdoor light according to the invention when realizing the outdoor light and a simple outdoor light not according to the invention being realizable without the set of components. The inventors have recognized that such a set is particularly advantageous because such a set allows the modular provision of both simply structured outdoor lights as well as special advantageous outdoor lights. The set thus ensures cost-effective implementation of large lighting projects, for example in cities. The same cover and the same first light-emitting device and the same support body are used for the different lights that can be realized with the set, in particular also the same cover. On the other hand, the exterior lights differ in that only some of the exterior lights use the set of components explained. In addition to the light source group assigned to it, the second light emitting device preferably includes the light emitting body explained above, in particular the reflector explained above and the diffuser explained above and in particular the tubular element explained above. The supporting body preferably comprises an upper and a lower supporting section and a connecting section which comprises a rod-like connecting part, it being possible for the connecting section to be supplemented by the tubular element in order to implement a lamp according to the invention. Electrical lines, which supply the light sources of the second light emitting device in an implemented lamp according to the invention, preferably run between the rod-like connecting part and the tubular element.

The invention also relates to an arrangement comprising at least two outdoor lights according to the invention. The outdoor lamps are arranged at such a distance from each other along a horizontal line-up direction that they together form a wall area that extends over the entire distance between them, which extends vertically over at least 2 m and is spaced from them by 2.5 m perpendicular to the line-up direction , with a homogeneous illuminance illuminate. The line-up direction preferably corresponds to the first horizontal straight line explained above. The wall area preferably extends vertically over an equal length of 1 m on each vertical side of the above-mentioned reference points of the outdoor lamps. The exterior lights of the arrangement are preferably designed to illuminate the wall area explained homogeneously in such a way that it is illuminated over its entire extent with an illuminance of between 1.5 lux and 3.5 lux.

The invention also relates to the use of an outdoor light according to the invention for illuminating an outdoor area, in particular a street. When used according to the invention, a horizontal floor area is illuminated with the first light emitting device and a vertical wall area is illuminated with the second light emitting device. In one embodiment of the use according to the invention, an illuminance and/or a light temperature is measured on the vertical wall area and the luminous flux emitted by the second light emitting device and/or the light temperature of the light emitted by the second light emitting device is changed until the illuminance and/or the light temperature has reached the specified value. This type of use of an outdoor light, which is completely unusual for outdoor lights, has turned out to be particularly advantageous with regard to the provision of an outdoor light according to the invention. In contrast to other uses of outdoor lights, in which lateral brightening can only be realized to some extent, in the embodiment according to the invention of using an outdoor light according to the invention, an illuminance and/or a light temperature is selectively applied to a vertical wall area is measured and the fact is used that the second light emitting device can be controlled independently of the first light emitting device, so that the luminous flux of the second light emitting device and thus the illuminance and/or the light temperature in the wall area can be adjusted independently of a desired illumination of the floor area. This setting or measurement preferably takes place while the first light-emitting device is switched off, ie is not emitting any light. In the use according to the invention, the luminous flux and/or the light temperature of the light emitted by the first light emitting device is preferably set independently of the setting of the luminous flux or the light temperature of the light emitted by the second light emitting device, while an illuminance or light temperature is being measured, with which the outdoor light illuminates the floor area. The first light-emitting device is preferably switched off during this setting or measurement. In one embodiment of the use according to the invention, a central control unit that is locally remote from the outdoor light and connected to it wirelessly or by wire is used, via which the control device of the outdoor light is controlled, with the central control unit specifying different luminous fluxes of the light that are the first and/or second light emitting device emits. For example, different luminous fluxes can be specified at different times of the day and/or on different days, for example on different days of the week and/or at different times of the year. As a result, light pollution can be prevented at times when lateral illumination of an area surrounding the outdoor light is of little relevance, whereas at other times when such Brightening is particularly desired, such a brightening can be carried out in a targeted manner. In one embodiment of the use according to the invention, a presence detection sensor is used, with the presence detection sensor being read out and the second light emitting device being controlled as a function of the readout of the presence detection sensor. The presence detection sensor is preferably connected to the control device of the exterior light via an interface, in particular a wireless interface. Such a presence detection sensor can be implemented in a conventional manner, for example the presence detection sensor can be designed as a camera, in which case the presence of people is inferred by an algorithm from the recordings made by the camera, or as an infrared sensor, in which case infrared radiation is used to detect the presence is inferred by people. In any case, the presence detection sensor is designed to output information about the presence of at least one person in the vicinity of the exterior light as a sensor value. The second light emitting device is preferably controlled depending on the information output by the presence detection sensor in such a way that the luminous flux and/or the light temperature of the light it emits is adjusted by means of the control device depending on the information; in particular, it can be provided that depending on the Information the second light emitting device on- the is switched off. A corresponding actuation of the first light emitting device, dependent on the information read from a presence detection sensor, can preferably be provided by means of the control device. In one embodiment of a use according to the invention, an arrangement comprehensively uses several outdoor lights according to the invention, with control data being exchanged between the outdoor lights of the arrangement. For this purpose, the exterior lights have interfaces that correspond to one another, in particular wired or wireless interfaces. This control data can include, for example, parameters relating to information read from a presence detection sensor and/or light temperature and/or light intensity of an ambient light. In the described embodiment of the use according to the invention, the second light-emitting device and in particular also the first light-emitting device of a specific one of the exterior lights in the arrangement is particularly preferably activated as a function of control data that this specific exterior light has received from another exterior light in the arrangement via its interface. In particular, the invention also relates to a corresponding, particularly advantageous arrangement of outdoor lights according to the invention. Provision is particularly preferably made in such an arrangement for each of the exterior lights to have an interface, with the exterior lights communicating with one another via their interfaces. The outdoor lights particularly preferably form a mesh system, so that all the outdoor lights of the arrangement form a mesh network and can be controlled together. Particularly preferably, all of the exterior lights can be controlled via a central control unit. In one embodiment, one of the exterior lights is designed as a master light and the other exterior lights are designed as slave lights that are controlled by the master light. In one embodiment, the use according to the invention relates to the use of an arrangement of outdoor lights according to the invention, with at least two, in particular all of the outdoor lights of the arrangement each have a presence detection sensor and the exterior lights have mutually corresponding interfaces via which they exchange information that was read from their respective presence detection sensors. All of the exterior lights of the arrangement are particularly preferably controlled as a function of all of the information that is read from the presence detection sensors of all of the exterior lights. The actuation preferably relates to the explained actuation of the second light-emitting device of the exterior lights.

The lamp according to the invention, the set according to the invention, the arrangement according to the invention and the use according to the invention can each have features that are explained in connection with generic lamps. Furthermore, it should be pointed out that different embodiments of the solutions according to the invention can each be combined with one another in a particularly advantageous manner.

The invention is explained in more detail below with reference to four figures using exemplary embodiments.

Show it:

Figure 1:

in a schematic basic representation a view of a section through a first embodiment of a lamp according to the invention;

Figure 2:

in various schematic representations of principles according to various components of the embodiment figure 1 ;

Figure 3:

in different schematic representations of principles different views of a further embodiment lamp according to the invention;

Figure 4:

in a schematic basic representation, sectional representations through the light intensity distribution bodies of the light emitting devices according to the embodiment figure 1 ;

Figure 5:

in a schematic representation of the principle of an embodiment of an arrangement according to the invention.

In figure 1 a view of a cross section of an embodiment of an exterior light 100 according to the invention is shown schematically in a schematic representation. The exterior lamp 100 comprises a supporting body which comprises an upper supporting section 3, a lower supporting section 9 and a connecting section connecting them. The connecting section comprises a rod-like connecting part 5 and a tubular element 4. The rod-like connecting part 5 serves to mechanically fix the supporting sections 3, 9 to one another and is detachably connected to the supporting sections 3, 9 for this purpose, which is generally advantageous according to the invention. The rod-like connecting part 5 is thus designed solely to keep the two support sections 3, 9 at a distance from one another. At its lower end, the supporting body also has a mast extension 8 designed in the manner of a truncated cone, which is designed to be placed on a corresponding truncated cone-shaped mast spigot of a lamp mast. The exterior light 100 is thus designed to be mounted on a light pole via the mast attachment 8, with the mast attachment 8 in the present case and according to the invention being advantageously fixed in position, in particular detachably, connected to the lower support section 9 and the latter being connected to the upper support section 3 via the connection section connected is. The outdoor lamp 100 further includes a translucent cover 1 having a trumpet-like shape and extending from the lower support portion 9 toward the upper support portion 3 . An opaque cover 2 is provided at the upper end of the cover 1, which completely covers the cover 1 on its upper side, which is generally advantageous according to the invention, and which, as is also generally advantageous, is held by the supporting body, so that the cover 2 is connected in a fixed position via the connecting section of the support body to the mast attachment 8 and is held thereon. Out of figure 1 It can be seen that the tube element 4 of the connecting section surrounds the rod-like part 5 of the connecting section and that the tube element 4 has the same shape as the cover 1, namely also a trumpet-like shape, with the outside of the tube element 4 facing towards the cover 1 of the exterior lamp being considered is, wherein the cover 1 encloses the interior. Corresponding guidance of the light can be ensured by the corresponding shapes of tube element 4 and cover 1 .

Out of figure 1 It can also be seen that the exterior lamp 100 has two light emitting devices, with a first light emitting device comprising a first light source group 10 which is arranged on the upper support section 3, and with the second light emitting device having a second light source group 20 which is arranged on the lower support section 9 . The second light emitting device also has a diffuser 6 and a reflector 7 . Some of the components of the outdoor lamp 100 are in figure 2 explained in more detail.

In figure 2 including the Figures 2a, 2b, 2c , 2d, and 2e 10 are various views of the outdoor light 100 according to FIG figure 1 or of components of this outdoor lamp 100 shown in various schematic representations. In Figure 2a is a view of the outdoor light 100, seen from an area surrounding the outdoor light 100, in which the mast attachment 8, the cover 1 and the lid 2 of the outdoor light 100 and the screws 80 for fixing the mast attachment 8 in a fixed position on a mast spigot can be seen . In Figure 2b is the lamp according to Figure 2a shown with an identical perspective but without the lid 2 and cover 1. Off Figure 2b in synopsis with figure 1 it can be seen that the upper support section 3 is designed like a pot, with the pot walls supporting the cover 2 and the light source group 10 being fastened to the bottom of the pot in such a way that its light sources 11 radiate downwards. The upper support section 3 is generally preferably pot-shaped, with an operating device for supplying the light sources of the outdoor light being preferably arranged inside the pot shape and in particular at least the light sources of the first light emitting device being arranged on the bottom of the pot. The operating device preferably includes the control device of the outdoor light. In the present case, a concealing element 12 is provided on the downward-facing outside of the bottom of the pot, which has cutouts through which the LEDs 11 dip downwards and covers the area between the cutouts, which is generally advantageous according to the invention. In Figure 2c the outdoor lamp 100 is in the same perspective as in FIGS Figures 2a and 2b shown but missing compared to Figure 2b the tube element 4 and the diffuser 6. Off Figure 2c It can be seen that the upper and lower support sections 3, 9 are held together by a rod-like connecting part 5 and that the reflector 7 has a reflector section which is vertically spaced from the light source group 20 and completely covers it horizontally, with the reflector 7 running conically from this reflector section with a further reflector section towards the lower support section 9 . In Figure 2d 12 is the same view of the outdoor lamp 100 as in FIGS Figures 2a to 2c shown compared to the Figure 2c but without the reflector 7 and without the light source group 20 and the carrier 22 on which the light sources 21 of the light source group 20 are arranged.

In Figure 2e individual components of the exterior light 100 of the exemplary embodiment described are each shown individually. Out of Figure 2e on the one hand it can be seen that the cover 1 and the tube element 4 have the same trumpet-like shape. Furthermore is off Figure 2e It can be seen that the light sources 21 are distributed on the carrier 22 in such a way that in the exterior lamp 100 they surround the connecting section, in this case consisting of rod-like connecting part 5 and tube element 4, and that the light sources 21 also the further reflector section 72, which conically extending from the reflector section 71 to the carrier 22 and the lower support section 9, surrounded circumferentially, which is generally advantageous. It can also be seen that the reflector 7 is designed so that its lower end dips into a recess provided in the carrier 22 . The diffuser 6 is designed as a truncated cone-like body which, in the exterior light 100, encloses both all light sources 21 of the light source group of the second light emitting device and the further reflector section 72, which tapers conically from the reflector section 71 to the carrier 22 and the lower support section 9 runs. From the synopsis of the in figure 2 The views shown can also be seen that in order to implement the figure 2 shown embodiment of an outdoor lamp 100 according to the invention a set is used, which comprises the supporting body, the first light emitting device, the second light emitting device and the cover 1. Starting from the in Figure 2d In the structure shown, an outdoor light 100 not according to the invention can be implemented by arranging the cover 1 to run between the lower support section 9 and the upper support section 3 of the support body, so that it completely encloses an interior space of the outdoor light 100, and the cover 2 on top of the Cover 1 is put on and is supported on the upper support section 3. Based on this outdoor light not according to the invention, an outdoor light 100 according to the invention with the figure 2 implement the set to be used by adding a kit to this outdoor lamp not according to the invention, comprising the tubular element 4, the diffuser 6, the reflector 7 and the support 22 with the light sources 21 of the light source group 20. When the set is used according to the invention, an outdoor light 100 according to the invention is implemented in that, starting from the outdoor light not according to the invention, the lower support section 9 is detached from the rod-like connecting part 5 and then the tubular element 4 is pushed onto the rod-like connecting part 5 and the support 22 is connected to the Reflector 7 and the diffuser 6 are also fixed to the lower support section 9 and the cover 1 is arranged to run between the support sections 3, 9, analogously to the realization of an outdoor lamp not according to the invention with the set according to the invention described. An electrical supply of the light sources 21 can be done by starting from the pot-like upper support section 3 electrical lines are routed between the rod-like connecting part 5 and the tube element 4 to the carrier 22 and the LEDs 21 arranged thereon. In the described exemplary embodiment of an outdoor light 100 according to the invention and generally preferred according to the invention, an operating device is arranged in the pot-like upper support section 3 and is supplied by supply lines that run upwards within the rod-like connecting part 5 starting from the mast attachment 8 . This operating device can be used to supply light source group 10 of the first light emitting device from the inside of pot-like upper support section 3, and light source group 20 of the second light emitting device by routing electrical lines, as explained, between rod-like connecting part 5 and tube element 4.

In figure 3 a further embodiment of an outdoor light 100 according to the invention is shown schematically in two schematic representations. This embodiment differs from that in FIGS figures 1 and 2 shown embodiment by the different arrangement of the light sources of the two different light emitting devices and by the different configuration of the second light emitting device. The first light emitting device is analogous to the light emitting device of the embodiment according to FIGS figures 1 and 2 formed and thus has a light source group 10 with light sources 11 and a cover element 12, wherein the light sources 11 and the cover element 12 are arranged on the underside of the pot-shaped upper support section 3 of the support body of the outdoor lamp 100. On the other hand, they are Light sources 91 of the second light emitting device designed as LED emitters, which are also arranged and held on the pot bottom of the pot-shaped upper support section 3 and emit light downwards from this pot bottom onto a reflector 90 designed like a truncated cone and surrounded by the second light emitting device. The reflector 90 forms the light-emitting body of the second light-emitting device, whereas in the exemplary embodiment according to FIGS figures 1 and 2 the diffuser 6 forms the light emitting body of the second light emitting device. The second light emitting device emits all of the light emitted by it into the environment, starting from the surface of the reflector 90, through the cover 1 into the environment. The surface of the reflector 90 and the light distribution with which the light sources 91 embodied as LED emitters of the second light emitting device emit light onto the reflector 90 are specifically designed in such a way that a homogeneous emission of light through the cover 1 for lateral illumination is achieved can.

In figure 4 In a schematic representation of the principle, the sectional areas through the light intensity distribution bodies of the first and second light emitting devices are shown in a first vertical sectional plane and in a second vertical sectional plane that is perpendicular to the first vertical sectional plane. The luminous intensity distribution bodies each indicate the spatial angle-dependent luminous intensity distribution with which the light emitting devices emit light. In figure 4 the point of the light source, which forms the zero point of the respective luminous intensity distribution body, can also be seen, as can the amounts of luminous intensity for the respective solid angle. In the figure 4 The representation shown is a conventional representation of cut surfaces in vertical cutting planes a light intensity distribution body. The contour curve A describes the outline of the sectional surface of the light intensity distribution body of the first light emitting device in the first vertical sectional plane, the contour curve B describes the outline of the sectional surface of the light intensity distribution body of the first light emitting device in the second vertical sectional plane, the contour curve C describes the outline of the sectional surface of the light intensity distribution body of the second Light emitting device in the first vertical sectional plane and the contour curve D describes the outline of the sectional surface of the light intensity distribution body of the second light emitting device in the second vertical sectional plane. Out of figure 4 it can be seen that the light intensity distribution body of the second light emitting device is essentially rotationally symmetrical, whereas the light intensity distribution body of the first light emitting device has a significantly wider radiation characteristic in the first vertical sectional plane than in the second vertical sectional plane. It can also be seen that the volume of the light intensity distribution body of the first light emitting device is significantly larger than the volume of the light intensity distribution body of the second light emitting device. True, the volumes are off figure 4 cannot be seen in full directly, but the cross-sectional representations of the luminous intensity distribution body in the two mutually perpendicular vertical sectional planes provide a good starting point for estimating the two volumes. So it's over figure 4 to recognize that the luminous flux emitted by the first light emitting device is substantially greater than the luminous flux emitted by the second light emitting device, and that the the second light emitter is designed for uniform lateral illumination in all directions, while the first light emitter is designed for substantial illumination of a horizontal floor which extends along the first vertical sectional plane over a significant length and along the second vertical sectional plane over a shorter length.

In figure 5 an embodiment of an arrangement according to the invention of outdoor lights 100 according to the invention is shown schematically in a schematic representation of the principle. Based figure 5 an embodiment of a use according to the invention is also explained. The arrangement according to the invention shown comprises three outdoor lights 100 according to the invention. The outdoor lights 100 are each arranged at the same vertical distance, in this case 4 m, from the ground. This is based on a reference point within the respective exterior light. In the present case and in a generally advantageous manner, the reference point corresponds to the geometric center point of the respective exterior lamp 100. The exterior lamps 100 are arranged in a row one behind the other along a first horizontal straight line. They are spaced from a side wall along a second horizontal straight line perpendicular to the first. Due to the angled course of the wall, different outdoor lamps 100 are located at a different distance along the second horizontal straight line from the wall at their height, with the height relating to the first horizontal straight line. Out of figure 5 it can be seen that each exterior light 100 illuminates a floor area E with its first light emitting device by means of its first light source group 10 and with its second light emitting device by means of its second Light source group 20 a wall area F of the wall shown. The first horizontal straight line corresponds to the line-up direction explained above, in which the exterior lamps 100 are lined up. The wall areas F and the floor areas E, which are each illuminated by the outdoor lights 100, overlap along the line-up direction or first horizontal straight line, so that the outdoor lights 100 homogeneously illuminate the floor and the wall over areas that extend uninterruptedly in the line-up direction. Out of figure 5 it can also be seen that each of the exterior lights 100 has a radio module 30 which is arranged at an interface of the control device of the respective exterior light 100 . On the one hand, the outdoor lights 100 can communicate with one another via their radio modules 30 and their associated interfaces, so that they can share information with one another. On the other hand, the exterior lights 100 can receive programming of their respective control device via their radio modules 30 . In figure 5 the process of such a programming in the context of an inventive use of the arrangement shown is shown schematically. In the generally advantageous use according to the invention, the illuminance is measured at the height of the wall by means of a light sensor 40, with which the second light emitting device of the outdoor light 100 irradiates the wall region F. This light sensor 40 is coupled to an input device, in this case a smartphone 50, via which the luminous flux, which the second light emitting device emits onto the wall area F by means of its second light source group 20 by means of its second light source group 20, is adjusted using the input device, in this case a smartphone 50. In this case, a predefined value of a desired illuminance is preferably in the input device or smartphone 50 Wall area F can be entered, the control device of the outdoor light 100 being programmed by the interaction of the radio module 30 and the input device or smartphone 50 with feedback, ie by reading out the information that is measured with the light sensor 40, so that the luminous flux that the second Light source group 20 emits, is changed until the desired value of the illuminance is reached. Corresponding programming can be carried out for each outdoor light 100, and since each outdoor light 100 has a different distance along the second horizontal straight line to the wall area F assigned to it, this advantageous embodiment of a use according to the invention can ensure that the wall as a whole is as homogeneous illuminance. According to the invention, the individual programming of the lamps by means of a measurement of the illuminance that they generate on a wall area, while changing the luminous flux until a desired illuminance is reached, is generally advantageous. In the exemplary embodiment described, the exterior lights 100 are to be used to illuminate a wall area by means of the second light-emitting device, which is located on one side with respect to the second horizontal straight line of the respective exterior light 100 . In certain specific embodiments of exterior lights 100 according to the invention, it may be desirable for the second light-emitting device to be shielded from glare at least along the first horizontal straight line, i.e. in the present case along the line-up direction and thus along the direction of the roadway, so that the second light-emitting device can thus be illuminated in a direction along the line-up direction at least is partially shaded. This can be advantageously realized, for example, according to the invention in that only such subgroups Light sources of the second light source group 20 of the exterior light 100 can be controlled to emit light, which illuminate the wall area F, but do not shine in the direction of the rowing direction; alternatively or additionally, shading elements can be provided in the exterior light, for example so-called shutters, which are on such sides of the LEDs positioned where glare suppression is desired. Such a shutter can be designed, for example, as an opaque, only slightly translucent optical block arranged next to the LED.

Reference List

1

cover

2

Lid

3

upper support section

4

tube element

5

rod-like connecting part

6

diffuser

7

reflector

8th

mast approach

9

lower support section

10

first light source group

11

Light source/LED

12

lamination element

20

second light source group

21

Light source/LED

22

carrier

30

radio module

40

light sensor

50

smartphone

71

reflector section

72

another reflector section

80

screw

90

reflector

91

light source

100

outdoor light

A

outline curve

B

outline curve

C

outline curve

D

outline curve

E

floor area

f

wall area

Claims (15)

Outdoor light (100), in particular street light, for mounting vertically above a floor for illuminating the floor when the outdoor light (100) is in an operating state, the outdoor light (100) comprising a first light emitting device comprising a first light source group (10), a second light emitting device comprising a second Light source group (20) and a control device for independently controlling the light source groups (10, 20) to emit light in the operating state, wherein the first light emitting device in the operating state emits at least 90% of the light emitted by it downwards, characterized in that the second light emitting device in the operating state emits at least 20%, in particular at least 30%, of the light emitted by it downwards and emits at least 20%, in particular at least 30%, upwards, with in particular a maximum luminous flux that can be emitted by the first light emitting device at least three times, in particular at least five times, in particular at least ten times one of the second Light emitting device is maximum radiated maximum luminous flux. Outdoor lamp (100) according to claim 1, characterized in that the light emitting devices for emitting light are each designed with a different spatial light intensity distribution body, with the light intensity distribution body specifying a spatial angle-dependent light intensity distribution starting from a light source point assigned to the respective light emitting device, with the light intensity distribution body of the first light emitting device having at least 90% of its body volume vertically below one running through its light source point horizontal plane and the light intensity distribution body of the second light emitting device is arranged with at least 20%, in particular at least 30%, of its body volume above a horizontal plane running through its light source point and with at least 20%, in particular at least 30%, of its body volume below this horizontal plane, In particular, the light intensity distribution body of the first light emitting device is at least three times as wide in a first vertical sectional plane as the light intensity distribution body of the second light emitting device and in a second sectional plane perpendicular to the first sectional plane is less than twice as wide, in particular narrower, than the light intensity distribution body of the second light emitting device, wherein in particular the light intensity distribution body of the second light emitting device by a vertical dividing plane can be divided into two sub-volumes, each of the sub-volumes being rotationally symmetrical over an angular range about a vertical axis of rotation of at least 60°, in particular at least 90°, in particular at least 120° and being able to be imaged axially symmetrically to the axis of rotation on a corresponding angular range of the other partial volume in each case. Outdoor light (100) according to any one of the preceding claims, characterized in that in the operating state, the second light-emitting device emits at least 10% of the light emitted by it into the same solid angle that the first light-emitting device completely illuminates, and/or that the first light emitting device is designed to emit light with a different light temperature than the second light emitting device, wherein in particular the control device is designed to change the light temperature emitted by the second light emitting device. Outdoor light (100) according to any one of the preceding claims, characterized in that the second light-emitting device is designed to uniformly illuminate a first angular range, which extends from 70° to 110°, in particular from 60° to 120°, to a vertical axis and lies in a first vertical sectional plane, with a first light intensity assigned to it, in particular on both sides of the Vertical axis in the first vertical sectional plane, and in particular a second angular range which extends from 70° to 110°, in particular from 60° to 120° to the vertical axis and is located in a second vertical sectional plane running perpendicular to the first vertical sectional plane through the vertical axis, to be evenly illuminated with a second light intensity assigned to it, in particular on both sides of the vertical axis in the second vertical sectional plane, with the first light intensity in particular deviating by less than 30%, in particular less than 20%, from the second light intensity. Outdoor light (100) according to any one of the preceding claims, characterized in that the first light-emitting device is designed to uniformly illuminate a main angular range assigned to it, which extends from 40° to 60°, in particular from 35° to 65°, to a vertical axis and lies in a first vertical sectional plane with a first light intensity assigned to it, in particular on both sides of the vertical axis in the first vertical sectional plane, and in particular in a second sectional plane running perpendicularly to the first sectional plane through the vertical axis, to continuously emit less than half, in particular less than a quarter of the first light intensity assigned to it, with the first light emitting device in particular in the first vertical sectional plane emits light over an angular range which is at least three times the width of an angular range over which the first light emitting device emits light in the second vertical sectional plane. Outdoor light (100) according to any one of the preceding claims, characterized in that the first light-emitting device is designed to, in the operating state, cover a horizontally running floor area (E), which is spaced 3.5 m along a vertical straight line from a reference point inside the exterior light (100) and which along a first horizontal straight line is 1 m from is spaced from the reference point and extends along the first horizontal straight line for 2 m and along a second horizontal straight line perpendicular to the first for 1 m, shall be continuously illuminated with an illuminance of between 30 lux and 60 lux, the second Light emitting device is designed to, in the operating state, a vertically running wall area (F), which is spaced 2.5 m from the reference point along the second horizontal straight line and extends over 1 m along the vertical straight line on both sides of the reference point and along the first horizontal straight lines extending over 2 m on both sides of the reference point shall be continuously illuminated with an illuminance between 1.5 lux and 3.5 lux. Outdoor light (100) according to any one of the preceding claims, characterized in that the light emitting devices each have a light emitting surface from which they emit the light emitted by them, the light emitting surfaces of the light emitting devices being offset vertically in relation to one another, the light emitting surface of the second Light emitting device is arranged below the light emission surface of the first light emitting device. Outdoor lamp (100) according to claim 7, characterized in that the exterior lamp (100) comprises a supporting body which comprises an upper supporting section (3) and a lower supporting section (9) as well as a connecting section connecting them, the light-emitting surface of the first light-emitting device being arranged on the upper supporting section (3) and the light-emitting surface of the second Light emitting device is arranged on the lower support section (9), with the connecting section in particular comprising a tube element (4) which forms a surface of the connecting section running between the support sections (3, 9) and within which electrical lines between the support sections (3, 9) get lost. Outdoor light (100) according to any one of the preceding claims, characterized in that the second light emitting device has a light emitting body which has a surface over which the second light emitting device emits the light emitted by it, the surface of the light emitting body extending over a vertical height of at least 2 cm and around a central vertical axis of the exterior lamp (100) is formed circumferentially, in particular the surface being formed to be diffusely scattering and/or reflective, in particular the light source group (20) of the second light emitting device disposed within the light emitter and adapted to emit light through the surface of the light emitter, or disposed vertically offset from the light emitter and adapted to illuminate the surface of the light emitter. Outdoor light (100) according to any one of the preceding claims, characterized in that the second light emitting device comprises a reflector (7, 90) and a diffuser (6) in addition to the second light source group (20), the second light emitting device being designed to emit at least 80% of the light it emits by means of the diffuser (6), wherein at least 50% of the light emitted by the diffuser (6) from the light sources (21, 91) of the second light source group (20) only reaches the diffuser (6) after it has been reflected at the reflector (7, 90), with the light sources in particular (21, 91) of the second light source group (20) distributed around a central vertical axis of the exterior lamp (100) on a horizontal support (22) and the reflector (7, 90) starting from a support (22) vertically opposite Reflector section (71), which horizontally covers the light sources (21, 91) of the second light source group (20), extends conically towards the carrier (22), the diffuser (6) in particular extending around the second light source group (20) from the Carrier (22) extends vertically to the reflector section (71). Outdoor light (100) according to any one of the preceding claims, characterized in that the exterior lamp (100) comprises a transparent cover (1) which delimits an interior space of the exterior lamp (100), in which the light source groups (10, 20) of the light emitting devices, in particular the light emitting devices, are arranged, with the light source groups (10, 20) Emit light from the interior onto the cover (1) to illuminate an area surrounding the outdoor light (100), in particular the outdoor light (100) comprising an opaque cover (2) which is arranged above the cover (1) and the cover ( 1) completely covers horizontally, with the second light-emitting device in the operating state emitting at least 20%, in particular at least 30%, of the light emitted by it above the cover (2), with the cover (1) and the tubular element (4) in particular having the same shape on their outer sides and/or that the supporting body of the outdoor light (100) forms a mast attachment (8) at its lower end for mounting on a mast spigot. Outdoor lamp (100) according to claim 11, characterized in that each light source (11) of the first light source group (10) is assigned a lens, with the light sources (11) of the first light source group (10) projecting any light they emit, starting from the lens assigned to them, directly onto the cover (1) of the exterior lamp (100) radiate, wherein the light sources (21, 91) of the second light source group (20) transmit at least 80% of the light they emit through a diffuser (6) surrounding them together to cover (1) the Outside light (100) radiate. Set for realizing an outdoor lamp (100) according to one of Claims 8 to 12, characterized in that the set comprises the supporting body, the first light emitting device, the second light emitting device and a cover (1), the set being designed to implement a first outdoor light (100) whose light sources (11, 21, 91) are formed exclusively by the first light emitting device , and is designed to realize a second outdoor lamp (100), whose light sources (11, 21, 91) are formed by the first and the second light emitting device and which is designed according to one of claims 10 to 15. Arrangement comprising at least two outdoor lights (100), each designed according to one of Claims 1 to 12, the two outdoor lights (100) being spaced apart from one another along a horizontal line-up direction at such a distance that they jointly unite over the entire distance illuminate the wall area between them, which extends vertically over at least 2 m and is 2.5 m apart from them perpendicular to the line-up direction, with a homogeneous illuminance. Use of an outdoor light (100) according to one of Claims 1 to 12 for illuminating an outdoor area, in particular a street, with a horizontal floor area (E) being illuminated with the first light emitting device and a vertical wall area being illuminated with the second light emitting device, with in particular on the vertical wall area (F) a Illuminance is measured and the luminous flux emitted by the second light emitting device is changed until the illuminance has reached a predetermined value.

Images