JP4540789B2 - LIGHTING DEVICE, ROOM EQUIPPED WITH THE SAME, AND LIGHTING METHOD - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lighting device and a lighting method for a room where light is blocked from the outside such as in a power plant, a large building, or an underground facility, and the room.
[0002]
[Prior art]
It is known that illumination that changes between day and night may affect biological rhythms, so-called biological clocks. These phenomena are said to occur easily in places such as the polar regions where the changes in day and night are scarce and in the monitoring control room without windows such as the central control room of the power plant. Therefore, in such a monitoring control room or the like, the lighting is devised to reduce the feeling of blockage or pressure. It is considered effective to keep the biological rhythm healthy by giving the lighting environment, which is an environmental factor, some kind of change and acting as a rhythm.
[0003]
Japanese Patent Application Laid-Open No. 9-306672 discloses an illumination load for performing indoor illumination and controlling the lighting of the illumination load so as to correspond to a change in the amount of sunlight from sunrise to sunset. There is described an illumination system including lighting control means for changing the illuminance of an illumination area illuminated by a load and making the illuminance higher than the average illuminance in the morning or afternoon during at least a predetermined period after noon.
[0004]
In this publication, in the power level setting section, the power setting value is set so that the nighttime is small and the daytime is large, and the sunrise and sunset are simulated in the morning and evening transition periods, respectively. It is described that the lighting load is controlled so that the illuminance after sunset in the illumination area becomes an illuminance suitable for work by changing the time.
[0005]
[Problems to be solved by the invention]
The daily life pattern of 24 hours a day consists of twilight hours when day and night intersect, daytime hours when sunlight falls, and nighttime hours when there is no sunlight. Reflecting the flow in a closed room such as a supervisory control room is important for maintaining biological rhythm. People who work and work in a sealed room become more comfortable by sensing day, night, and twilight with the sensor from the tone of natural light and reflecting them in the lighting design.
[0006]
In view of the above, an object of the present invention is to provide an illuminating device that enables workers and business operators to work and work while feeling day, night, and dusk.
[0007]
The present invention provides an environment in which people working in a sealed place such as a monitoring control room can work and work while maintaining biological rhythm by feeling day and night in a more natural state throughout the day. The purpose is to provide.
[0008]
[Means for Solving the Problems]
In order to achieve these objectives, the effect can be enhanced not only by increasing and decreasing the brightness during the day and night, such as bright in the daytime and dark at night, but also by adding further ingenuity.
[0009]
For this reason, the present invention can detect outside light, display the state of outdoor sunshine, and can be illuminated by a plurality of different types of local lighting that distinguish day and night that can be controlled by a light sensor installed outdoors. It is intended to produce.
[0010]
In the present invention, the day is divided into day and night, the time zone before and after sunrise in the meantime is defined as sunrise, the time zone before and after sunset is defined as sunset, and both are defined as twilight. Provide an effective means for maintaining biological rhythm. That is, the present invention provides the following apparatus and method.
[0011]
The present invention is an illuminating device having an illuminating lamp for illuminating a room, wherein the illuminance of the illuminating lamp corresponds to the amount of sunlight, and the illuminating lamp is from sunrise to sunset. measurement and a plurality of first lamp, the a first second lamp color temperature than the illumination lamp is more of less different color type of the transition of the amount and direction of change of the sunlight that corresponds to sunlight The plurality of first illuminations so that the amount and direction of sunlight are reproduced based on the amount and direction of sunlight from sunrise to sunset as measured by the optical sensor. lights are controlled are sequentially turned or lighted out sequentially, based on the amount and direction of sunlight and during sunrise sunset the light sensor is measured, the plurality of such light amount or direction of the solar light is reproduced second lamp is controlled by sequentially turned or sequentially off To provide a lighting apparatus characterized by.
[0012]
The present invention is based on the assumption that the illuminance of the illuminating lamp corresponds to the amount of sunlight on the premise that sunlight is not incident because it is blocked from the outside world, and the entire room that secures the illuminance necessary for work and work is average A general illumination area that illuminates automatically, and a local illumination area that is controlled so that the illuminance varies with time, and is equipped with an optical sensor that measures changes in the amount of sunlight and changes in direction. Then , based on the amount or direction of sunlight from sunrise to sunset as measured by the optical sensor, a plurality of first illumination lamps are sequentially turned on so that the amount and direction of sunlight are reproduced. Or turn off sequentially ,
And a plurality of color temperatures lower than those of the first illumination lamp so that the amount and direction of sunlight are reproduced based on the amount and direction of sunlight at sunset and sunrise as measured by the optical sensor . second lamp sequential lighting or sequentially turned off, the color temperature of the station plant illumination area I than, the incidence of light from the outside of the at least one of Temporal change of the irradiation direction or illuminance is interrupted room I will provide a.
[0013]
The present invention is a room lighting method in which the illuminance of an illuminating lamp is adapted to the amount of sunlight on the premise that sunlight is not incident because it is shielded from the outside, and a room that secures the illuminance necessary for work and work. It consists of a general illumination area that certifies the whole on average, and a local illumination area that is controlled so that the illuminance varies with time, and changes in the amount of sunlight and changes in direction are measured by an optical sensor, and the local illumination area Then, based on the amount or direction of sunlight from sunrise to sunset as measured by the optical sensor, a plurality of first illumination lamps are sequentially arranged so that the amount and direction of sunlight are reproduced. The first illumination lamp is turned on or sequentially turned off, and the light amount and direction of the sunlight is reproduced based on the light amount or direction of sunlight at sunset and sunrise measured by the light sensor. More color temperature Lower plurality of the second lamp sequential lighting or off, color temperature of the station plant illumination area it than the incident light from the outside world for illuminating at least one is over time change of the irradiation direction or illuminance Provide a lighting method for a room where is blocked.
[0014]
Here, the color temperature is an ideal temperature radiator temperature (unit K) indicating the color. Light with a low color temperature is reddish, and light with a high color temperature is bluish. Compared with fluorescent lamps and incandescent lamps, fluorescent lamps have a higher color temperature and are close to daylight. (Source: “New Lighting System Design Theory and Equipment Development Technology” / Issued by a training company / Industrial Technology Association, Inc.)
[0015]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment according to the present invention will be described below with reference to the drawings.
[0016]
Two types of different illumination lights in rooms 2 without windows and no incident of outside light (natural light), for example indoor 2 in room 1 such as power station, police station, fire station, railway central monitoring control room or basement 3, 4 are arranged. The illuminating lamp 3 is represented by a fluorescent lamp (fluorescent lamp) and is a white luminaire, and is referred to as a first illuminating lamp here. The illuminating lamp 4 is typified by a spotlight of an incandescent light bulb, which is yellow or warm and has a limited illuminance. Here, it is called a second illumination lamp.
[0017]
A daylight fluorescent lamp, a metal highland lamp, a transparent mercury lamp, a three-wavelength emission fluorescent lamp, a fluorescent mercury lamp, a white fluorescent lamp, and a warm white fluorescent lamp can be used as the first illumination lamp, and a parogen is used as the second illumination lamp. Light bulbs, silica light bulbs, high pressure sodium lamps, etc. can be used.
[0018]
The first illuminating lamp 3 and the second illuminating lamp 4 are each composed of a plurality of illuminating lamps. In FIG. 1, six illuminating lamps 3a, 3b, 3c, 3d, 3e, 3f and 4a, 4b, Although 4c, 4d, 4e, and 4f are disclosed, it is not limited to this.
[0019]
In addition, switches 5 and 6 for turning on and off the respective illumination lamps in response to a control signal are provided indoors. In the figure, 5a, 5b, 5c, 5d, 5e, 5f and 6a, 6b, respectively. 6c, 6d, 6e, 6f are disclosed.
[0020]
A desk 11 is disposed indoors, and a zigzag cutout 12 as an example is disposed thereon. The cutout 12 includes six cutout portions 12a, 12b, 12c, 12d, 12e, and 12f, and a first illumination lamp is disposed inside each cutout. Moreover, the 2nd illumination lamp is arrange | positioned 1 each in the upper part of each cut part.
[0021]
Three optical sensors 21, 22, and 23 are placed outdoors, and directions are given by the separating plates 24, respectively. Sunlight is irradiated toward the optical sensors 21, 22, 23 in the morning, noon, and evening. As a result, the daytime situation corresponding to the amount of sunlight from sunrise to sunset is measured by the optical sensors 21, 22, and 23, and the night time corresponding to the amount of sunlight from sunset to sunrise is measured. The situation is measured by the optical sensors 21, 22 and 23. Of course, when the sun goes down, the measured value of the light sensor is constant except during twilight.
[0022]
When the optical sensors 21, 22, and 23 sense light, they generate signals 25, 26, and 27. These signals are subjected to an AND condition by the AND circuits 28, 29, 30, and 31, and a switch signal is generated when the AND condition is satisfied. . However, the AND condition is not taken for the leftmost and rightmost lines in the figure, and if a signal is generated, it becomes a switch signal immediately. Alternatively, a switch signal may be generated when the current exceeds a certain value. These signal lines are respectively connected to the switch circuit 5. With this configuration, the illumination of the first illuminating lamp 3 is controlled by the change in the amount or direction of sunlight from sunrise to sunset. That is, a plurality of illuminating lamps having a fluorescent lamp placed in a white system, for example, a cutout (slit) 12 are turned on in the order of 3a → 3b → all illumination at sunrise, and all the lamps are maintained in the daytime. At sunset, the illumination lights 3a to 3d are first turned off about 2 hours before sunset, and then 3e and 3f are turned off sequentially. This is shown by cases (A) to (E) in FIGS.
[0023]
Further, turning off and lighting of the second illumination lamp 4 are shown by cases (i) to (iv) and cases (i ′) to (iv ′). In the morning at sunrise and in the evening at sunset, the amount of light measured by the optical sensor 21 is compared with thresholds 1-6. At night, when all of the spotlights that are the second illumination lamps 4 are turned on by the threshold 1 (case (i ′)), the illumination lamp 4b is turned off when the amount of light exceeds the threshold 2. (Case (ii ′)). In this way, the illumination lamps 4c to 4f are sequentially turned off (cases (iii ') to (iv')).
[0024]
At sunset, 3a to 3d of the first illuminating lamp 3 are turned off, but 3e and 3f are kept turned on (case (d)), then to case (e), and all lights are turned off. Become. It may be set to turn on and off sequentially.
[0025]
The interval between the lighting and turning-off of each illumination lamp of the second illumination lamp 4 is set shorter than the illumination pattern of the first illumination lamps 3a, 3b or 3e, 3f.
[0026]
Therefore, according to the illumination pattern as described above, at the time of sunrise and sunset, a part of the first and second illumination lamps 3 and 4 wraps, that is, overlaps and is lit twice. Thereby, the actual switching of the illumination by the first illumination lamp and the second illumination lamp proceeds smoothly, and it is not necessary to feel a foreign object.
[0027]
As shown in FIGS. 2 and 3, the first lamp 3 is turned on and off during the sunrise, about 2 hours after sunrise, and between 2 hours before sunset and until sunset. The illumination lamp 4 is controlled to be turned off and on during sunrise, about 30 minutes after sunrise, and from 30 minutes before sunset to sunset. In this way, indoor lighting can be used to produce day and night atmospheres without using a control device timer such as a computer.
[0028]
In conjunction with a timer, it may be set so that some of the spotlights are turned off at midnight, for example, after midnight.
[0029]
An optical sensor for measuring a change in the amount of sunlight is provided, the illuminance of the first illumination light is controlled by a change in the amount or direction of sunlight from sunrise to sunset, and the sunset The illuminance of the second illumination lamp is controlled by the change in the amount of light or the direction of sunlight from time to sunrise, so that at least one of color temperature, irradiation direction, and illuminance changes over time. By detecting outside light, it is possible to express outdoor sunlight. The color temperature of the second illumination lamp is set to be lower than that of the first illumination lamp. Further, at the time of sunrise or sunset, the first illumination lamp and the second illumination lamp are wrapped and turned on. It is possible to produce daytime, nighttime, and twilight atmosphere lighting by a lighting device having a plurality of local lights controlled by a single or a plurality of optical sensors 21, 22, 23 installed outdoors.
[0030]
It is also possible to control the arrangement of the plurality of light sensors 21, 22 and 23 in the sunshine direction and the turn-on / off of the plurality of local illumination lamps, and to combine with the turn-on / off of other local illumination lights.
[0031]
Moreover, the threshold value of the control signal which controls a some local illumination light is provided, and the illumination by the illumination expression which gave the change more by the mutual timing of lighting / extinguishing of a local illumination light can be produced.
[0032]
Moreover, illumination can be produced by controlling the power of the light source in the local illumination by switching with the control signals from the optical sensors 21, 22, and 23 to turn on and off.
[0033]
FIG. 4 shows another embodiment of the present invention. The same components as those shown in the embodiment of FIG. 1 are denoted by the same reference numerals, and description thereof will not be repeated. The same applies to the other examples below.
[0034]
Moreover, the threshold value of the control signal which controls a some local illumination light is provided, and the illumination by the illumination expression which gave the change more by the mutual timing of lighting / extinguishing of a local illumination light can be produced.
[0035]
In FIG. 5, the optical sensor 41 includes six types of optical sensor units 41a, 41b, 41c, 41d, 41e, and 41f. Each sensor portion is provided with a light shielding material 42 (including a semi-light shielding material) except for the left end portion, and the degree of light shielding is set so as to increase toward the right end. As a result, six types of control signals are generated by the optical sensor 41.
[0036]
FIG. 5 shows an example of turning on and off the fluorescent lamp as the first illumination lamp and the spotlight as the second illumination lamp arranged in the slit when using six sensors as shown in FIG. Indicates. The illuminance of the fluorescent lamp is controlled by changes in the amount of sunlight from sunrise to sunset by the six sensors, and the spotlight is controlled by changes in the amount of sunlight from sunset to sunrise. A method for controlling the illuminance will be described. At sunrise (for example, 6 o'clock), one fluorescent lamp is turned on according to one sensor input value, and one spotlight is turned off. Thereafter, the fluorescent lamps are sequentially turned on for 30 minutes, and the spotlights are turned off sequentially. Thereafter, all the fluorescent lamps are kept in the lighting state until sunset (for example, 18:00), and the daytime atmosphere is shown in the fluorescent lamp lighting state. At the time of sunset, contrary to the situation described above, the fluorescent lamp that was turned on last is turned on first, and the spotlight that was turned off last is turned on first as the first spotlight. Then, the spotlights are sequentially turned on for 30 minutes. After 30 minutes, all fluorescent lights are turned off, all spot lights are turned on, and the night atmosphere appears. In this way, it is possible to create a situation in which at least one of the color temperature, the irradiation direction, and the illuminance changes over time, and to finely reflect the situation by lighting in the room.
[0037]
FIG. 6 shows another embodiment of the present invention. In this example, the control signal produced by the optical sensor 43 is reconstructed as six different control signals by six different resistors 44. The first illumination lamp 3 and the second illumination lamp 4 are turned on and off by these six different control signals.
[0038]
Even in the example shown in FIG. 6, the situation shown in FIG. 5 can be created.
[0039]
Moreover, the threshold value of the control signal which controls a some local illumination light is provided, and the illumination by the illumination expression which gave the change more by the mutual timing of lighting / extinguishing of a local illumination light can be produced.
[0040]
FIG. 7 shows another embodiment of the present invention. Six light sensors 45 are provided at different installation angles in the morning, noon, and evening sunlight. Since the angle is changed and the directional plate 46 is provided, control signals can be generated by the six optical sensors according to the direction of sunlight. With this configuration, another illumination pattern can be created.
[0041]
FIG. 8 shows a modification of the first illumination lamp. Illumination by the second illumination lamp is not shown because it is the same as the previous example.
[0042]
In the example shown in FIG. 8, one light source 51 is adopted and connected to the power source 52. The light source 51 is housed in a light box 53, and a liquid crystal shutter 54 is provided in a part of the light box 53, so that the amount of light from the light source 51 can be controlled. A liquid crystal operation driver 55 is provided to operate the liquid crystal shutter 54 and is electrically connected to the power source 52. The liquid crystal operation driver 55 is connected to an optical sensor switch (not shown), and an ON / OFF control signal from the optical sensor switch is transmitted to the liquid crystal operation driver 55. The liquid crystal operation driver 55 operates in response to the ON / OFF control signal, controls the power source 52 and the liquid crystal shutter 54, and corresponds to the ON / OFF control signal, that is, from the light source 51 corresponding to the day and night situations. Light is irradiated from a window (light emitting surface) 56 with illuminance control. As a modification, the irradiation can be controlled by a movable shutter or a mirror movable control device.
[0043]
FIG. 9 shows an example in which the present invention is applied to a central monitoring control room 61 of a power plant. It may be the basement of an underground building. The present invention is particularly effective when there are no windows in these rooms, light from the outside world is blocked, and the state of light of the day is unknown.
[0044]
In this embodiment, the room 62 of the central monitoring control room 61 is divided into a general illumination area 63 and a local illumination area 64. The general illumination area 63 is an area that illuminates on average that secures the illuminance necessary for work and work. In this area, a large screen 65 and an operation console 66 are provided for central monitoring. Various consoles 66 are provided with various computers. A chair 67 is provided close to the console 66, and a command console 68 and a command chair 69 are provided behind it. In this area, an illuminance of a predetermined limit, for example, 1000 lux or more is secured on average for work and business.
[0045]
In this room 62, a refresh corner is provided for the purpose of maintaining a healthy biological rhythm of the staff. Local lighting is installed at the refresh corner, and the local lighting area 64 does not affect the overall lighting. In this local illumination area 64, the illuminance is controlled, and a plurality of white-colored illumination lamps are sequentially turned on or off sequentially according to the change in the amount of sunlight from sunrise to sunset, and from sunset to sunrise. Depending on the transition of the change in the amount of sunlight, a plurality of yellow or warm-colored illumination lamps are sequentially turned on or off sequentially, thereby providing illumination that produces day and night atmospheres.
[0046]
In the present embodiment, sequential lighting or sequential extinction of a plurality of white-colored illuminating lamps and sequential lighting or sequential extinction of a plurality of yellow-colored or warm-colored illuminating lamps in the refresh corner are the same as in the embodiment shown in FIG. It is preferable that the control is performed so as to reproduce the change in the amount of sunlight and the change in the direction of the light measured by an optical sensor installed outdoors. Moreover, you may make it illuminate with the lighting pattern which preset the transition of the change of the light quantity of the sunlight from the time of sunrise to the time of sunset, and the time of sunset and the sunrise.
[0047]
The refresh corner is formed in a section of the room 1, and is provided with a desk 11, a table 72, and a chair 73 (an easy chair). A cutout 12 is provided on or above the desk 11, a fluorescent lamp (not shown) as a first illuminating lamp close to the wall 79, and a spot as a second illuminating lamp 76 on the ceiling There is a light. A glass 78 subjected to a light diffusion treatment is provided by connecting the leading edge of the thinning 12 to soften the light.
[0048]
10 and 11 show the details of local illumination. FIG. 10 is a plan view, and FIG. 11 is a side sectional view. As shown in FIG. 11, a fluorescent lamp 75 is provided on the wall 79. The length of the cutout 12 is longer than the length of the fluorescent lamp 75 so as to be accommodated in the length.
[0049]
From the time of sunset to the time of sunrise, maintaining the biological rhythm is important for those who are out of their normal lives and are monitoring the power plant, and a lighting atmosphere different from the daytime is required. The use of the first illumination lamp 3 and the second illumination lamp 4 described above, in which the natural light is more strongly influenced than the illumination method in which the illuminance is simply reduced (the light quality is homogeneous), is the amount and nature of the light. It is certain to change and you can get visual comfort.
[0050]
【The invention's effect】
In the present invention, at least the first illumination lamp and the second illumination lamp which is non-homogeneous with the first illumination lamp are adopted, and daylight and nighttime including dusk are detected by the optical sensor, Because changes in the natural light of the outside world are reflected in the lighting of the room by the amount and nature of the light, indoor lighting can be used as daytime and nighttime lighting without using a control device such as a computer or a timer. Able to work and work while maintaining a biological rhythm that allows people working in places where sunlight is not incident, such as a windowless monitoring and control room, to feel day and night more naturally throughout the day. An environment that can be used is provided.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing an outline of an embodiment of the present invention.
FIG. 2 is an illumination pattern diagram showing the state of illumination from sunrise to sunset and from sunset to sunrise.
FIG. 3 is a diagram showing a lighting state from sunrise to sunset and from sunset to sunrise.
FIG. 4 is a configuration diagram showing an outline of another embodiment of the present invention.
FIG. 5 is an illumination pattern diagram showing another illumination state.
FIG. 6 is a configuration diagram showing an outline of another embodiment of the present invention.
FIG. 7 is a configuration diagram showing an outline of another embodiment of the present invention.
FIG. 8 is a schematic configuration diagram of a modification of a part of the embodiment of the present invention.
FIG. 9 is a schematic configuration diagram of an embodiment to which the present invention is applied.
10 is a plan view showing a part of FIG. 7 in detail.
11 is a side view showing a part of FIG. 7 in detail.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Room, 2, 62 ... Indoor, 3 ... 1st illumination light, 4 ... 2nd illumination light, 5, 6 ... Switch (switch circuit), 11, 71 ... Desk, 12, 78 ... Cut off (slit ) 21, 22, 23, 41, 45 ... optical sensor, 24 ... separation plate, 25, 26, 27 ... signal, 28, 29, 30 ... AND circuit, 44 ... resistor, 46 ... directional plate, 61 ... central monitoring Control room, 63 ... General illumination area, 64 ... Local illumination area, 65 ... Large screen, 66 ... Operating console, 72 ... Table, 73 ... Chair, 74 ... Partition, 75 ... Fluorescent lamp, 76 ... Spotlight, 78 ... Light Diffusion treated glass, 79 ... stand, 80 ... ceiling.

Claims (5)

Has an illumination lamp to illuminate the room, the illuminance of the lamp to a lighting apparatus that corresponds to the amount of sunlight,
The lamp is provided with a first lamp corresponding to solar light until sunset during sunrise and a second lamp of the first lamp color temperature is lower than that of different color type,
Comprising a light sensor that measures the transition of change in light quantity of the sunlight,
Based on the light quantity of sunlight until sunset during sunrise which the light sensor is measured, the illumination of the first lamp such that the light quantity of the sunlight is reproduced is controlled,
Based on the light quantity of the sunlight at sunset time and sunrise which the light sensor is measured, illumination intensity of the second illumination lamp as the light quantity of the sunlight is reproduced is being controlled apparatus. An illuminating device having an illuminating lamp that illuminates the room, and the illuminance of the illuminating lamp corresponds to the amount of sunlight,
The illumination lamp includes a plurality of first illumination lamps corresponding to sunlight from sunrise to sunset;
A plurality of different-color second illumination lamps having a color temperature lower than that of the first illumination lamp;
An optical sensor that measures the change in the amount of sunlight and the change in direction,
The plurality of first illumination lamps are sequentially turned on or off sequentially so that the amount and direction of sunlight are reproduced based on the amount and direction of sunlight from sunrise to sunset as measured by the optical sensor. Being controlled and
The plurality of second illumination lamps are sequentially turned on or off so that the light quantity or direction of sunlight is reproduced based on the light quantity and direction of sunlight at sunset and sunrise measured by the light sensor. A lighting device characterized by being controlled . In claim 1 or 2,
An illumination device characterized in that the first illumination lamp and the second illumination lamp are overlapped and turned on at sunrise or sunset. In a room where the illuminance of the illuminating lamp is made to correspond to the amount of sunlight, assuming that sunlight is not incident because it is blocked from the outside world,
It consists of a general lighting area that averagely illuminates the entire room that secures the illuminance necessary for work and work, and a local lighting area that is controlled so that the illuminance varies with time.
An optical sensor that measures changes in the amount of sunlight and changes in direction is provided.
In the local illumination region, a plurality of first light amounts and directions are reproduced so that the light amount and direction of sunlight are reproduced based on the light amount or direction of sunlight from sunrise to sunset as measured by the optical sensor . Turn the lights on or off sequentially ,
And a plurality of color temperatures lower than those of the first illumination lamp so that the amount and direction of sunlight are reproduced based on the amount and direction of sunlight at sunset and sunrise as measured by the optical sensor . Turn on or turn off the second lamp sequentially .
Color temperature of the station plant illumination area it than the irradiation direction or at least one of the incident light from the outside world, characterized by the Temporal changes was blocked room of illuminance. In the lighting method of the room that corresponds to the amount of sunlight of the illuminance of the illuminating lamp on the premise that the sunlight is blocked from the outside world,
It consists of a general lighting area that proves on average the entire room that secures the illuminance necessary for work and work, and a local lighting area that is controlled so that the illuminance varies with time.
Changes in the amount of sunlight and changes in direction are measured with an optical sensor,
In the local illumination region, a plurality of first light amounts and directions are reproduced so that the light amount and direction of sunlight are reproduced based on the light amount or direction of sunlight from sunrise to sunset as measured by the optical sensor . Turn the lights on or off sequentially,
And a plurality of color temperatures lower than those of the first illumination lamp so that the amount and direction of sunlight are reproduced based on the amount and direction of sunlight at sunset and sunrise as measured by the optical sensor . Sequentially turn on or off the second lighting ,
Color temperature of the station plant illumination area it than the illumination method of the room in which the incident light is cut off from the outside world, characterized by illuminating at least one is over time change of the irradiation direction or illuminance.

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