EP3070400A1 - Illumination device - Google Patents

Abstract

Embodiments provide a lighting device with an elongated base and a pivotable, elongated lighting unit. This pivotable, elongated illumination unit is pivotably mounted about a longitudinal axis by means of at least one joint. Parallel to this longitudinal axis extends both the elongated base and the pivotable, elongated lighting unit. In particular, the elongate extent of the pivotable, elongated lighting unit is limited by two opposite side surfaces. The illumination unit comprises at least two illumination elements which are arranged along the pivotable axis, so that a distance between two adjacent illumination elements corresponds to a 1.5 to 2.5 times the distance between a luminous element positioned adjacent to a side surface and the corresponding side surface.

Description

Embodiments of the present invention relate to a lighting device and a system comprising two lighting devices.

In lighting devices, a distinction is made between head-moved and fixed systems. Head moving systems typically include a base or fixed unit and a base unit pivotable lighting unit. The lighting unit typically comprises one or more lighting elements, such as e.g. Light bulbs, LEDs or other bulbs, by means of which a light cone can be generated with a predetermined by the housing or the housing opening orientation. In order to align the light cone, the entire lighting unit is typically pivotally arranged relative to the base by means of one or more joints, wherein the pivoting process can be carried out either manually or remotely controlled.

Both the fixed and the moving head systems differentiate between single spots and arrays. By means of arrays it is possible to achieve a uniform illumination over at least a flat area. However, since the size of the area to be illuminated often changes, the flexibility of such arrays is severely limited, which is why in many areas of use the spots are again resorted to, which are then individually positioned next to one another in a complex manner, so that a uniform illumination can take place. Therefore, there is a need for an improved approach.

The object of the present invention is to provide a device or a system which can be used flexibly and at the same time enables a good areal illumination.

The object is solved by the subject matter of independent patent claim 1 and the subject of independent claim 15.

Embodiments of the present invention provide a lighting device with an elongate pedestal and a pivotable elongated lighting unit.

This pivotable, elongated illumination unit is pivotably mounted about a longitudinal axis by means of at least one joint. Parallel to this longitudinal axis extends both the elongated base and the pivotable, elongated lighting unit. In particular, the elongate extent of the pivotable, elongated lighting unit is limited by two opposite side surfaces. The illumination unit comprises at least two illumination elements which are arranged along the pivotable axis, so that a distance between two adjacent illumination elements corresponds to a 1.5 to 2.5 times the distance between a luminous element positioned adjacent to a side surface and the corresponding side surface.

According to further embodiments, as described above, a system is provided with at least two lighting devices. Here, a distance between two luminous elements positioned adjacent to the adjacent side surfaces of the two illuminating devices is 0.5 to 1.5 times the distance between two adjacent luminous elements of one of the two illuminating devices.

Thus, embodiments of the present invention are based on the recognition that uniform illumination can be achieved by means of a system comprising a plurality of elongate illumination devices each having a plurality of luminous elements arranged along the longitudinal axis when the individual elongated illumination devices are so configured, that even when juxtaposing a plurality of elongated lighting devices, a distance between the individual lighting elements remains substantially constant. To ensure this, the distance between a luminous element, which is arranged at the edge, ie adjacent to the next lighting device, and the respective outer side of the lighting device is selected in dependence on a distance between two adjacent lighting elements in the lighting device itself. As a result, as already indicated above, it is achieved that as soon as two or more lighting devices are arranged in series, ie directly adjacent to one another, the distances across the plurality of lighting elements of the lighting devices remain approximately the same.

Further embodiments of the present invention provide a lighting device comprising laterally arranged legs each having a hinge, whereby the engagement between the elongated base and the pivotable, elongated lighting unit takes place or the swivel is realized. These legs can also be designed as bearing blocks with swivel joints.

According to preferred embodiments, the pivotable, elongate illumination unit comprises a recess for each bearing block or each leg. Thus, for example, the side surface of the pivotable, elongated lighting unit can conclude flush with the respective bearing block or complete reset, so that therefore the entire elongated extent of the lighting device are specified by the side surfaces of the pivotable, elongated lighting unit. As a result, this means that the elongate base preferably has a smaller or maximally equal elongated extent than a region of the pivotable, elongated illumination unit. This geometric arrangement has been found to be advantageous in terms of the desired juxtaposition of multiple lighting devices. The above-mentioned recesses also offer the advantage that lighting-relevant elements, such as e.g. the optics can be arranged in a protruding region, that is to say overlapping the recess and the leg arranged in the recess.

According to further embodiments, the lighting device is preferably pivotable by at least 180 ° or more. This can be realized, for example, that the above-mentioned legs or generally the base is made waisted. The pivoting can also be done remotely via a control panel or generally remotely controlled via a corresponding interface. For this purpose, the lighting device then comprises means for the motorized pivoting of the pivotable, elongated lighting unit. These may for example comprise a motor arranged in the elongated base, a pinion fixedly connected to the pivotable, elongate lighting unit and / or a drive belt.

As already indicated above, each elongate illumination unit comprises a plurality of illumination elements arranged along the elongate extent of the pivotable, elongate illumination unit or, in particular, regularly arranged illumination elements, such as, for example. LEDs.

According to further embodiments, the individual lighting elements may be coupled with lenses that allow a focused radiation in the form of a lighting cone. The lenses can according to further embodiments additionally be designed to focus the illumination cone. In this case, a distance between the illumination element and the respective lens is then varied. The adjustment of the distance can be motorized or even by hand erfoigen.

According to further embodiments, the plurality of lenses for the plurality of illumination elements may also be designed as a lens arrangement, thus in one unit. Here, a distance between two adjacent lenses is then selected so that it corresponds to 1.5 times to 2.5 times the distance between a lens positioned adjacent to the side surface and the corresponding side surface.

To return to the above embodiment with the recess for the leg or the bearing block, it should be noted that according to further embodiments, the lens arranged on the edge may be arranged overlapping this recess and thus overlapping to the leg or the bearing block.

Fig. 1

eine schematische Darstellung einer Beleuchtungsvorrichtung gemäß einem ersten Ausführungsbeispiel;

Fig. 2a-c

eine schematische Seitenansicht einer Beleuchtungsvorrichtung gemäß einem weiteren Ausführungsbeispiel in drei verschiedenen Schwenkpositionen;

Fig. 3a

eine schematische Detailansicht der Beleuchtungsvorrichtung aus Fig. 2a-c mit Fokus auf die Mittel zur Schwenkung;

Fig. 3b-c

eine schematische Detailansicht der Beleuchtungsvorrichtung aus Fig. 2a-c mit Fokus auf die Optik;

Fig. 4a-b

schematische Schnittdarstellungen der Beleuchtungsvorrichtung aus Fig. 2a-c mit Fokus auf die Mittel zur Schwenkung;

Fig. 5a und 5b

Ausführungsbeispiele einer erfindungsgemäßen Beleuchtungsvorrichtung; und

Fig. 5c

eine Rückansicht des Ausführungsbeispiels aus Fig. 5b.

Hereinafter, embodiments of the present invention will be explained with reference to the accompanying drawings. Show it:

Fig. 1

a schematic representation of a lighting device according to a first embodiment;

Fig. 2a-c

a schematic side view of a lighting device according to another embodiment in three different pivot positions;

Fig. 3a

a schematic detail view of the lighting device Fig. 2a-c with focus on the means of pivoting;

Fig. 3b-c

a schematic detail view of the lighting device Fig. 2a-c with a focus on optics;

Fig. 4a-b

schematic sectional views of the lighting device off Fig. 2a-c with focus on the means of pivoting;

Fig. 5a and 5b

Embodiments of a lighting device according to the invention; and

Fig. 5c

a rear view of the embodiment Fig. 5b ,

Before embodiments of the present invention will be explained in detail with reference to the figures, it is to be noted that like-acting elements and structures are provided with the same reference character, so that the description of which is mutually applicable or interchangeable.

Fig. 1 shows an illumination device 10 with an elongated base 12 and a pivotable, elongated illumination unit 14. The pivotable, elongated illumination unit 14 is pivotally mounted about the longitudinal axis 16. For this purpose, the lighting device comprises a joint 18. The joint 18 may be designed, for example, as a rotary joint or as a different kind of joint, so that a pivoting movement of the lighting unit 14 is made possible.

Both the base 12 and the lighting unit are formed as elongated elements, both of which extend parallel to the longitudinal axis 16. The longitudinal extent, in particular of the pivotable, elongate illumination unit 14 is limited by two opposite side surfaces 14a and 14b. Normally, the elongate illumination unit 14 has a rectangular base body whose side walls are just the side surfaces 14a and 14b, while so-called longitudinal surfaces are arranged between these surfaces 14a and 14b. Along the longitudinal extent (parallel to the longitudinal axis 16), the at least two lighting elements 20a and 20b are arranged.

The arrangement of the lighting elements 20a and 20b takes place taking into account certain distance specifications. According to this, the distance x _20ab between two adjacent _luminous elements 20a and 20b is about 1.5 times to 2.5 times as large as a distance a _14a between one of the side surfaces 14a and the nearest luminous element 20a. It should be noted that also the distance a _14b (between 20b and 14b) can be taken as a reference distance. According to preferred embodiments, the distance x _{20ab is} even only 1.9 times to 2.1 times the distance a _14a and a _14b, respectively. Even if it is not possible starting from always existing manufacturing tolerances, however, it is the goal according to further embodiments that the distance x _{20ab is} as exactly as twice as large as the distance a _14a or a _14b . Namely, all of these distance conditions result in that, when the lighting device 10 is used in combination with another lighting device 10 '(dashed line in FIG The distance x _20ab of adjacently arranged _luminous elements of the two illuminating _devices 10 and 10 ', in this case, for example, 20b' and 20a is approximately the same as the distance a _20ab . This results in a regular arrangement or distribution of the lighting elements 20a, 20b, 20a ', 20b'. It is thus advantageously achieved a uniform illumination due to the regular arrangement, in addition, a scalability of the system (10 + 10 ') is given by the number of lighting devices 10, 10' to be used is varied. The handling is very simple, since the lighting devices 10 are placed next to each other or adjacent to each other. It should be noted that the regular arrangement across the plurality of illumination devices 10 and 10 'is typically or better obtained when the side surfaces 14a and 14b' are contiguous or even touching.

According to further embodiments, each of the lighting device or, more precisely, each elongated lighting unit has a plurality of lighting elements. These can all be arranged along the longitudinal extent. As already indicated above, the regular arrangement with regard to the light distribution is preferred. Thus, within a lighting unit 14, an approximately constant distance a _{20ab is} desired. Here, 0.75 times to 1.25 times, or even 0.9 times to 1.1 times, one distance in relation to the other distance is considered substantially constant.

Depending on the embodiment, the engagement between the pivotable, elongated illumination unit 14 and the base 12 can be designed differently. In the in Fig. 1 illustrated embodiment, the intervention takes place by a hinge, which is arranged between a leg 12a of the base 12 and a portion 14t of the illumination unit 14.

According to embodiments, the lighting unit 14 is provided in the region 14t with a recess 14g, so that legs 12a and 14t, through which the pivot axis 16 passes, may be arranged side by side, without negatively affecting the overall dimensions of the lighting device 10. In detail, the recess 14g is deeper in the longitudinal direction than the leg 12a is wide, so that the leg 12a and the side surface 14a are flush or the surface of the leg 12a is recessed with respect to the side surface 14a. A flush closure is understood to mean a closure in which the surfaces (14a and surface of the leg 12a) are arranged with a maximum offset of 1 mm or 5 mm. By means of this flush or recessed closure, a plurality of illumination devices 10 and 10 'can be arranged directly adjacent to each other next to each other.

Each lighting device preferably, but not necessarily, comprises two side parts or laterally arranged legs 12a, between which the area 14t of the lighting unit 14 is arranged.

Fig. 2a-2c show side views of the lighting device 10 with base 12 and pivotable, elongated lighting unit 14. The base 12 here again includes the laterally disposed leg 12a, which can also be referred to as a bearing block.

In the Fig. 2a-2c In each case, the lighting device is pivoted in a different direction, so that the light cone 22 either to the left ( Fig. 2a ), up ( Fig. 2b ) or to the right ( Fig. 2c ) is aligned. The light cone 22 or its direction is through the opening 14 o (see also Fig. 1 ). Based on Fig. 1 In this regard, it can also be seen that all lighting elements 20a and 20b face towards this opening 14o.

Starting from the above-explained recess 14g of the illumination unit 14, a kind of projection 14s of the illumination unit 14 is formed in the region of the opening 14o (cf. Fig. 1 ). By this projection 14s, the mobility or pivoting of the lighting unit 14 may be limited. To avoid this limitation, the leg 12a is shaped accordingly. Thus, on the one hand, this has a round shape, which curves around the longitudinal axis 16, so that the pivoting of the illumination unit 14 is made possible. On the other hand, the leg 12a also has a waist 12t, so that the angular range in which the lighting unit 14 can be pivoted can be increased. Here, the angular range may preferably include at least 180 °, if not more, such as 210 °.

Referring to Fig. 3 and 4 Two sub-aspects of the above embodiments will now be explained. Fig. 3a shows the lighting device 10 from Fig. 2 , wherein the base 12 and in particular of the legs 12a is shown cut. This leg 12a serves as a bearing block and thus carries the bearing 18, plain bearings or ball bearings. In the bearing, for example, a shaft which extends along the pivot axis 16 and is coupled to the illumination unit 14, a. As shown here, means for motorized pivoting of the illumination unit 14 are provided about the longitudinal axis 16. The means may comprise, for example, a drive belt 32 and motor 34, by cooperation of which the illumination unit 14 can be pivoted about the axis 16.

The illumination unit 14 therefore has engaging portions 36, eg a pulley, which is fixedly coupled to the illumination unit 14. The motor 34 may be implemented, for example, as a stepping motor or high-resolution stepping motor. The belt 32 wraps around pulley 36 (output pinion 36) and motor pinion 34. By the arrangement / wrapping of the belt 32 and the pulley 36 and the waist 12t is vorgebeben, in particular from Fig. 3a becomes clear. The arrangement of motor 34, belt 32 and pinion 36, which is supported by the bearing 18 is also based on Fig. 4a and 4b clear. Here it can be seen that the leg 12a is made as narrow as possible, in which case limits are set in particular by the width of the bearing 18 or of the belt 32. Furthermore, however, it can also be seen that it is advantageous to arrange the motor 34 in the base, as this does not adversely affect the width of the leg 12a. In other words, the arrangement of the motor 34 in the base 12 can be described by being arranged in the front view below the element 14t of the illumination unit 14.

According to further embodiments, the illumination device or in particular the illumination unit 14 has an optic 38, such as a lens or lens arrangement on. The lens arrangement 38 may, for example, comprise a plurality of lenses arranged next to one another, each lens being associated with a lighting element 20a, 20b and 20c (cf. Fig. 3b and 3c or from Fig. 4a and 4b ). The lens assembly 38 is disposed between the light emitting elements 20a, 20b and 20c and the opening 14o. The lens elements 38 make it possible to focus the light cone 22 by varying the distance between the lens 38 and the light elements 20a, 20b and 20c. Thus, for example, a zoom range of 7 ° to 50 ° can be achieved, wherein preferably the adjustment of the same motorized takes place in such a way that the total lens arrangement 38 is displaced. A position of the zoom lens 38 is, for example, in Fig. 3b or 4a, which allows a wider cone of light 22. This position can also be referred to as a wide-angle position. In Fig. 4b or 3c is the so-called "spot position" shown, which allows a highly focused beam 22. It is also possible that individual lenses or lenses of the overall lens arrangement 38 are interchangeable.

In particular, based on Fig. 4 It is clear that it is advantageous to shift the head pivot point (see axis 60) with respect to the optics farther to provide sufficient space for the optics including the adjustment mechanism (not shown). As a result, a lens of the lens arrangement 38 may also partially overlap with the leg 12a (at least in the side view). This is desirable since the optical regions project so far along the edge (cf., lateral surfaces 14a) that a projection without a light slit is possible even when a plurality of illumination devices are arranged side by side (cf. Fig. 1 ). Due to the overlapping of the arrangement of the lens arrangement 38 with the leg 12a, it is possible that the light-emitting elements (LEDs) can also be arranged in a region 14t of the illumination unit which is arranged between the legs, ie not in the widened, protruding head part, since the light rays of the last LED in the series only spread to the full width of the zoom lens when it was in the spot position. The size or width of the opening 14o is chosen so that a projection in wide-angle position without foreclosure by the housing 14 is possible.

According to further embodiments, the lens spacings of the lens array 38 are constant. This means that a lens distance between two lenses preferably corresponds to 0.75 to 1.25 times or even 0.9 to 1.1 times a lens distance between two further lenses. As explained above with respect to the spacing of the luminous element 20a from the side surface 14a and the side surface 14b, respectively, the lens pitch of the peripheral lens relative to the side surface 14a is approximately 0.5 times (0.35-0.65) pitch to choose between two lenses.

Fig. 5a shows a first application example of the lighting device 10 with an elongated lighting unit 14, which comprises a total of 10 lighting elements arranged in series. Although these lighting elements, which may be, for example, high-power RGBW LEDs, are not visible here, since they are arranged behind the lenses of the lens arrangement 38. The base 12 is also designed as an elongated element with two legs 12a. As can be seen, the elongated extent of the stand 12 is at most as large as that of the lighting unit 14, but can preferably also be smaller. Depending on the version, a control with a backlit graphic display 43 and / or an interface for the power supply and / or for remote control (eg via a protocol such as eg DMX-512) can be provided in the base 12. In this embodiment, the interface to the remote control 45 is disposed in a recessed area 47, so that the width extension is not affected by any connected cables. Via the control panel 43 or via the remote control protocol, for example, the pivoting, adjustment of the zoom or activation or deactivation of other effects, such as stroboscopic effect, pulse effect, individual activation or deactivation of individual pixels or LEDs, color variation per LED, but also Feedback or possibly error messages.

Fig. 5b shows another lighting device 10 with double the length and double the number of lighting elements. With regard to the further features, the lighting device corresponds to Fig. 5b of the lighting device Fig. 5a , Fig. 5c shows a rear view, here the rear view of the lighting device Fig. 5b , In this rear view, the base 12 does not comprise the operating panel 43 or terminal 45, but cooling openings 49 which serve to cool the drive 34 (not shown). As can be seen in particular in this view, both the base 12 and the lighting unit 14 is designed as a screw construction.

Referring to Fig. 1 be noted that here also another embodiment of the present invention, namely the system comprising at least the two lighting devices 10 and 10 'is shown.

Referring to Fig. 1 It should be noted that the leg 12a or the joint 18 may not necessarily be designed as a laterally arranged leg, but also as a centrally arranged leg.

In terms of Fig. 1 It should also be noted that the surfaces 14a and 14b or 14b 'may be flat or curved or otherwise.

According to embodiments, the lighting devices 10 and 10 'may also be connected to rent so as to serve as a positioning aid. The connection can be made over the side surfaces of the legs 12a / 12b or over surfaces 14a to the surface 14b '. For this purpose, either a flange or pin or another connecting means may be formed on these surfaces.

With regard to the above-mentioned exemplary embodiments, it should be noted that, even if the arrangement of the plurality of lighting units has always been shown in such a way that they must extend along the elongate extent, ie on a common axis, it should be noted that this is not necessarily the case is. For example, the arrangement of the lighting elements can also be arranged in several rows, e.g. each offset or parallel in several rows. Furthermore, a luminous element may also be provided by a plurality of luminous units, e.g. a plurality of LEDs may be formed. To determine the distance between the individual lighting units, the lighting elements are always set to the intensity maximum point in the luminous distribution or to the center of the luminous element / lens for each embodiment of the lighting elements. Thus, it is also easily possible to meet the above-mentioned arrangement conditions for non-point-shaped or planar light-emitting elements.

Referring to Fig. 2 According to embodiments, the stand is designed primarily for standing operation and therefore includes the feet / rubber feet 24. Alternatively, a fastening by means of cleats (or other attachment points) take place. In addition, eyelets for security mounting can be provided. According to further embodiments, threads may be provided instead of the feet 24, so that a suspended mounting is possible. regardless of the manner of attachment, it is possible to arrange a plurality of illumination devices 10 and 10 'in a seamless manner while maintaining the pixel spacing (regular arrangement of the light-emitting elements 20a and 20b).

Referring to Fig. 3b and 3c It should be noted that the opening 14o may be closed by a transparent pane, such as a Plexiglas or glass pane.

According to embodiments, in the region 14t or preferably over the entire surface of the region 14t, a heat sink may be provided for cooling the light elements. In general, active cooling, e.g. be provided by fans, for cooling of lighting unit and / or control or swivel mechanism.

Claims (15)

Lighting device (10, 10 '), having the following features: an elongate pedestal (12) extending parallel to a longitudinal axis (16); a pivotable elongate illumination unit (14) extending parallel to the longitudinal axis (16), the elongate extension of the pivotable elongate illumination unit (14) being bounded by two opposing side surfaces; wherein the pivotable, elongated illumination unit (14) by means of at least one hinge (18) about the longitudinal axis (16) is pivotally mounted, and wherein the pivotable elongate illumination unit (14) comprises at least two light elements arranged along the pivotable, elongated illumination unit (14), such that a distance (a _20ab ) between two adjacent _illumination elements is 1.5 times to 2.5 times. a pitch (a _14a , a _14b ) between an adjacent to one of the side surfaces (14a, 14b) positioned luminous element and the corresponding side surface (14a, 14b) corresponds. Lighting device (10, 10 ') according to claim 1, wherein the lighting device (10, 10') comprises two laterally arranged legs (12a) each having a hinge (18), by means of which the pivotable, elongated lighting unit (14) with the elongated stand (12) is engaged; and or
wherein the elongate pedestal (12) comprises two laterally disposed pedestals (12a), the hinges (18) being pivots, and wherein the pivotable elongate illumination unit (14) is disposed between the pedestals (12a) and engages the pivots via the hinges is. Lighting device (10, 10 ') according to one of the preceding claims, wherein the elongated base (12) comprises two laterally arranged bearing blocks (12a) and wherein the pivotable, elongated illumination unit (14) each has a recess (14g) for the respective bearing block (12a); and or
wherein the recess (14g) is formed such that the side surfaces (14a, 14b) of the pivotable, elongated illumination unit (14) are flush or recessed with side surfaces (14a, 14b) of the bearing blocks (12a). Lighting device (10, 10 ') according to one of the preceding claims, wherein the elongated base (12) has a smaller or maximally equal elongated extent than the pivotable, elongated lighting unit (14). The lighting device (10, 10 ') of any one of the preceding claims, wherein the pivotable elongate illumination unit (14) is pivotable about at least 180 degrees or more about the longitudinal axis (16); and or
wherein the elongated base (12) or legs (12a) are waisted so that the pivotable elongate lighting unit (14) is pivotable by at least 180 degrees or more. Lighting device (10, 10 ') according to one of the preceding claims, wherein the lighting device (10, 10') further comprises means for motorized pivoting of the pivotable, elongate lighting unit (14); and or
wherein the means for pivoting comprises a motor (34) arranged in the elongated pedestal (12), a pinion (36) fixedly coupled to the elongate, pivotable lighting unit (14) and / or a drive belt (32). Lighting device (10, 10 ') according to one of the preceding claims, wherein the lighting device (10, 10') has a plurality of regularly arranged lighting elements (20a, 20b, 20c). Lighting device (10, 10 ') according to one of the preceding claims, wherein the lighting elements (20a, 20b, 20c) are LEDs. Lighting device (10, 10 ') according to one of the preceding claims, wherein the pivotable, elongated lighting unit (14) comprises a heat sink (14t). Lighting device (10, 10 ') according to one of the preceding claims, wherein the at least two light-emitting elements are designed to emit a light cone (22) perpendicular to the longitudinal axis, and
wherein the at least two light cones (22) are pivoted together with the pivotable elongated illumination unit (14). A lighting device (10, 10 ') according to any one of the preceding claims, wherein each lighting element (20a, 20b, 20c) is coupled to at least one lens (38); and or
wherein a distance between the illumination element (20a, 20b, 20c) and the respective lens (38) is variable, so that a light cone (22) of the respective illumination element (20a, 20b, 20c) can be focused; and or
wherein the pivotable, elongated illumination unit (14) comprises a lens assembly (38), which is designed as a unit, and
wherein a distance (a _20ab ) between two adjacent lenses (38) of the lens assembly (38) is 1.5 to 2.5 times the distance (a _14a , a _14b ) between an adjacent to the side surface (14a, 14b) positioned lens (38) and the corresponding side surface (14a, 14b) corresponds. A lighting device (10, 10 ') according to any one of claims 2 to 11, wherein the lens (38) adjacent to a side surface (14a, 14b) is at least partially overlapping one of the legs (12a). Lighting device (10, 10 ') according to one of the preceding claims, wherein the base (12) comprises a control panel (43). Lighting device (10, 10 ') according to one of the preceding claims, wherein the base (12) comprises a recess (47) with a connection terminal (45); and or
wherein the device comprises an interface via which the lighting device (10, 10 ') can be controlled remotely. A system (10 + 10 ') comprising at least two lighting devices (10, 10') according to any one of claims 1 to 14 adjoining each other via respective side surfaces (14a, 14b),
wherein a distance (a _14a , a _14b ) between two adjacent to the adjacent side surfaces (14a, 14b) of the two lighting devices (10, 10 ') positioned luminous elements 0.5 times to 1.5 times the distance (a _20ab ) between two adjacent lighting elements of one of the two lighting devices (10, 10 ') corresponds.

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