Lighting control device, lighting system, lighting fixture, and lighting fixture control method

Abstract

To obtain a lighting control device, a lighting system, a lighting fixture, and a lighting fixture control method that can provide a lighting environment suitable for an individual.SOLUTION: A lighting control device according to the present disclosure includes a control unit that reduces at least one of the luminous flux or the color temperature of a light emitting unit corresponding to a seat of an individual among a plurality of light emitting units as the elapsed time from the start of work of the individual becomes longer.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a lighting control device, a lighting system, a lighting fixture, and a method for controlling a lighting fixture. [Background technology]

[0002] Patent Document 1 discloses a lighting control device that adjusts the correlated color temperature of a lighting load installed in a specified space and adjusts the light output of the lighting load to adjust the illuminance of the specified space. The control unit of the lighting control device adjusts the correlated color temperature of the lighting load to a first correlated color temperature and adjusts the illuminance of the specified space to a first illuminance during a first time slot from a specified time in the morning to around noon. The control unit reduces the correlated color temperature of the lighting load from the first correlated color temperature to a second correlated color temperature over time and reduces the illuminance of the specified space from the first illuminance to a second illuminance over time during a second time slot in the afternoon that is set after the first time slot. This lighting control device can achieve both a lighting environment favorable to biological rhythms and energy conservation during working hours in the workplace. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5895193 Summary of the Invention [Problem to be solved by the invention]

[0004] Generally, about 14 hours after waking up in the morning and being exposed to sunlight, melatonin begins to be secreted, and the body begins to prepare for rest. To ensure this circadian rhythm functions normally, measures such as those described in Patent Document 1 are sometimes used. However, Patent Document 1 assumes that all employees on an entire floor work according to the same rhythm. In reality, however, various working styles are envisioned, including staggered work hours, flextime, a hired labor system, work intervals, free address systems, satellite offices, and telecommuting.

[0005] For example, in the case of flextime, the start time of work varies from person to person, and therefore, it is thought that the optimal light environment for the normal functioning of circadian rhythms will differ between someone who gets up early to start work and someone who gets up late to start work.

[0006] The present disclosure has been made to solve the above-mentioned problems, and aims to provide a lighting control device, a lighting system, a lighting fixture, and a method for controlling a lighting fixture that can provide a lighting environment that is suitable for an individual. [Means for solving the problem]

[0007] The lighting control device according to the present disclosure includes a control unit that reduces at least one of the luminous flux or color temperature emitted by a light-emitting unit corresponding to the individual's seat among a plurality of light-emitting units as the elapsed time from the start of work of the individual increases. The control unit reduces at least one of the luminous flux or color temperature emitted by the light-emitting unit corresponding to the individual's seat according to the timetable as the elapsed time from the start of work of the individual increases, and after a predetermined time, sets the light-emitting unit to a predetermined luminous flux regardless of the timetable. do. The lighting control device according to the present disclosure includes a control unit that reduces at least one of the luminous flux or color temperature emitted by the light-emitting unit corresponding to an individual's seat among a plurality of light-emitting units as the time that has elapsed since the individual started work increases, and the control unit reduces at least one of the luminous flux or color temperature emitted by the light-emitting unit corresponding to the individual's seat according to a timetable as the time that has elapsed since the individual started work increases, and when the individual is absent, controls the light-emitting unit corresponding to the individual's seat according to a basic timetable regardless of the individual's start time of work.

[0008] The lighting system according to the present disclosure includes a plurality of light-emitting units provided to correspond to a plurality of seats, and a lighting control device that reduces at least one of the luminous flux or color temperature emitted by a light-emitting unit among the plurality of light-emitting units that corresponds to the seat of an individual as the elapsed time from the start of work by the individual increases. The lighting control device reduces at least one of the luminous flux or color temperature emitted by the light-emitting unit corresponding to the seat of the individual according to the timetable as the elapsed time from the start of work of the individual increases, and after a predetermined time, sets the light-emitting unit to a predetermined luminous flux regardless of the timetable. do.

[0009] A lighting fixture according to the present disclosure includes a light-emitting unit, a lighting circuit that lights up the light-emitting unit, and a control unit that controls the lighting circuit so as to reduce at least one of the luminous flux and color temperature emitted by the light-emitting unit as the elapsed time from the start of work of an individual using a seat corresponding to the light-emitting unit increases, The control unit reduces at least one of the luminous flux or color temperature emitted by the light-emitting unit according to a timetable as the elapsed time from the start of work of the individual increases, and sets the light-emitting unit to a predetermined luminous flux after a predetermined time regardless of the timetable. do.

[0010] A lighting device control method according to the present disclosure includes detecting a workday start time for an individual, identifying a light-emitting unit corresponding to the individual's seat, and reducing at least one of the luminous flux and color temperature emitted by the identified light-emitting unit as the time elapsed since the workday start time increases. According to a timetable, the longer the elapsed time from the start of work of the individual, the lower at least one of the luminous flux or color temperature emitted by the specified light-emitting unit is, and after a predetermined time, the light-emitting unit is set to a predetermined luminous flux regardless of the timetable. do. [Effects of the Invention]

[0011] In the lighting control device, lighting system, lighting fixture, and lighting fixture control method according to the present disclosure, the luminous flux or color temperature emitted by the light-emitting element corresponding to the individual's seat decreases as the time that has elapsed since the start of work for the individual increases, thereby providing a lighting environment that is suited to the individual. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a block diagram of a lighting system according to a first embodiment. [Figure 2] 1 is a block diagram of a lighting fixture according to a first embodiment. [Figure 3] 1 is a plan view illustrating the arrangement of seats and light-emitting units according to the first embodiment. FIG. [Figure 4] 1 is a perspective view of a lighting fixture according to a first embodiment. [Figure 5] FIG. 4 is a diagram illustrating changes in illuminance and color temperature according to the first embodiment. [Figure 6] FIG. 10 is a block diagram of a lighting system according to a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0013] A lighting control device, a lighting system, a lighting fixture, and a method for controlling a lighting fixture according to each embodiment will be described with reference to the drawings. The same or corresponding components are designated by the same reference numerals, and repeated description may be omitted.

[0014] Embodiment 1 FIG. 1 is a block diagram of a lighting system 100 according to a first embodiment. The lighting system 100 includes a lighting control device 10 that controls lighting fixtures 40 via a controller 30. The lighting control device 10 is, for example, a building management server, a PC (Personal Computer), or a tablet. The lighting control device 10 is connected to the controller 30 on each floor via a wireless or wired connection.

[0015] Controller 30 is connected wirelessly or by wire to lighting fixture 40. In response to a control command from lighting control device 10, controller 30 transmits a control signal to lighting fixture 40 to control the output of lighting circuit 42, which will be described later.

[0016] 2 is a block diagram of lighting fixture 40 according to embodiment 1. Lighting fixture 40 includes a plurality of light-emitting units 45 and a lighting device 41. Lighting device 41 includes a lighting circuit 42 that turns on light-emitting units 45, a control unit 43 that controls lighting circuit 42, and a communication unit 44 that communicates with the outside. Communication unit 44 receives a control signal from controller 30. Control unit 43 controls lighting circuit 42 in accordance with the control signal received by communication unit 44. Lighting circuit 42 is a power supply circuit that supplies power to turn on light-emitting units 45.

[0017] The lighting device 40 includes, for example, four light-emitting units 45. Each light-emitting unit 45 includes a plurality of light sources 45a, 45b that emit light of different colors. The light sources 45a, 45b are, for example, LEDs. For example, two types of light sources, 5000K and 2700K, are provided as the light sources 45a, 45b. The light-emitting unit 45 may include three or more types of light sources.

[0018] The control unit 43 can independently control the light-emitting states of the plurality of light-emitting units 45 via the lighting circuit 42. The light-emitting states include, for example, color temperature and luminous flux. The control unit 43 can control the color of light emitted by each light-emitting unit 45 by controlling the output balance between the plurality of light sources 45 a and 45 b.

[0019] FIG. 3 is a plan view illustrating the arrangement of seats 80 and light-emitting units 45 according to the first embodiment. FIG. 4 is a perspective view of lighting fixture 40 according to the first embodiment. Lighting fixtures 40 are installed on the ceiling, for example, one at regular intervals every 2.4 m x 2.4 m. Multiple light-emitting units 45 are provided corresponding to multiple seats 80. In other words, one light-emitting unit 45 illuminates one seat 80. Each light-emitting unit 45 is provided, for example, directly above the corresponding seat 80.

[0020] As shown in FIG. 1 , a detection device 20 is provided at each seat 80. The detection device 20 is, for example, a card reader that reads an employee ID card or a FeliCa (registered trademark) card built into a smartphone. Multiple detection devices 20 may be provided corresponding to multiple seats 80, and may be provided away from the seats 80. Each of the multiple detection devices 20 acquires personal information identifying an individual using the corresponding seat 80. The personal information may be, for example, an employee number. Each of the multiple detection devices 20 may detect the start time of the workday of the individual using the corresponding seat 80. The personal information or workday start time information detected by each detection device 20 is transmitted to the lighting control device 10. The detection device 20 may transmit information identifying its corresponding seat 80 to the lighting control device 10 along with the personal information.

[0021] Next, the operation of the lighting system 100 will be described. First, assume that an employee sits down at one of the seats 80. At this time, the employee holds up, for example, an employee ID card over the detection device 20 provided at the seat 80. As a result, the detection device 20 detects the personal information of the employee using the corresponding seat 80.

[0022] The communication unit 11 of the lighting control device 10 receives the personal information from the detection device 20. The work start time detection unit 13 of the lighting control device 10 acquires the work start time of the individual identified by the personal information received from the detection device 20 from an external work management system or the like.

[0023] The memory unit 15 stores correspondence relationships between a plurality of seats 80 and a plurality of light-emitting units 45. The identification unit 12 identifies, from the plurality of light-emitting units 45, a light-emitting unit 45 that corresponds to a seat 80 identified by information identifying the seat 80, based on the correspondence relationships stored in the memory unit 15. The lighting control unit 14 controls the light-emitting unit 45 identified by the identification unit 12, based on the work start time detected by the work start time detection unit 13. For each of the plurality of seats 80, the lighting control unit 14 reduces the luminous flux and color temperature emitted by the light-emitting unit 45 corresponding to the seat 80 as the elapsed time since the start of work of the individual using the seat 80 increases.

[0024] The memory unit 15 of the lighting control device 10 may store a correspondence relationship between personal information and a plurality of light-emitting units 45. In this case, the identification unit 12 identifies, from the plurality of light-emitting units 45, a light-emitting unit 45 that corresponds to the seat 80 of the individual identified by the personal information received from outside, based on the correspondence relationship stored in the memory unit 15. The lighting control unit 14 controls the light-emitting unit 45 identified by the identification unit 12 based on the work start time detected by the work start time detection unit 13. The lighting control unit 14 reduces the luminous flux and color temperature emitted by the light-emitting unit 45 corresponding to the personal information as the elapsed time since the start of work of the individual identified by the personal information increases.

[0025] Lighting control unit 14 sends a control command to controller 30 via communication unit 11 to control light-emitting unit 45 identified by identification unit 12. Controller 30 sends a control signal to lighting fixture 40 in response to the control command. In lighting fixture 40, control unit 43 receives the control signal via communication unit 44. Control unit 43 controls lighting circuit 42 to reduce at least one of the luminous flux or color temperature emitted by light-emitting unit 45 as the elapsed time since the start of work of the individual occupying seat 80 corresponding to light-emitting unit 45 identified by the control signal increases.

[0026] FIG. 5 is a diagram illustrating changes in illuminance and color temperature according to the first embodiment. The color temperature and luminous flux at the start of work are preferably high to promote activity. For example, the color temperature at the start of work is 6500 to 5000 K and the illuminance is 1000 to 750 lx. The color temperature and luminous flux at the end of work are preferably low to avoid interfering with melatonin secretion. In this case, it is preferable to ensure an illuminance of 300 lux or more, which is necessary for precision work, in accordance with Article 604 (Illuminance) of the Industrial Safety and Health Regulations.

[0027] The lighting control unit 14 may decrease the luminous flux and color temperature emitted by the light-emitting unit 45 corresponding to the individual's seat 80 according to the timetable as the amount of time that has elapsed since the individual's workday began increases. The timetable is stored, for example, in the memory unit 15. The basic timetable in FIG. 5 is a timetable for when an individual arrives at work on time. The color temperature and illuminance of the light-emitting unit 45 that illuminates worker A who arrives at work on time gradually decrease from the start of work according to the basic timetable.

[0028] The first timetable is a timetable for the light-emitting unit 45 that illuminates employee B, who arrived at work two hours later than the regular time. The first timetable is shifted two hours later than the basic timetable. The second timetable is a timetable for the light-emitting unit 45 that illuminates employee C, who arrived at work one and a half hours earlier than the regular timetable. The second timetable is shifted one and a half hours earlier than the basic timetable.

[0029] When an individual is absent, the lighting control unit 14 may control the light-emitting unit 45 corresponding to the individual's desk according to the basic timetable, regardless of the individual's work start time. Here, absence includes when the individual has left work, before arriving at work, or is temporarily away from their desk. In FIG. 5, because worker B left work at 8:00 p.m., the light-emitting unit 45 that had been illuminating worker B is controlled according to the basic timetable from 8:00 p.m. Therefore, the color temperature and illuminance become the same as those in the basic timetable from 8:00 p.m. Similarly, because worker C left work at 7:30 p.m., the light-emitting unit 45 that had been illuminating worker C is controlled according to the basic timetable from 7:30 p.m.

[0030] In this embodiment, the luminous flux and color temperature emitted by the light-emitting unit 45 corresponding to the individual's seat 80 among the multiple light-emitting units 45 are reduced as the time elapsed since the start of work for the individual increases. In other words, the amount and color of light illuminating the individual can be controlled according to the start time of the individual's workday. This makes it possible to provide a lighting environment suited to the individual. Specifically, after a certain amount of time has passed since the start of work, exposure to light with a high color temperature and high illuminance, which can easily disrupt the circadian rhythm, can be suppressed. In this way, exposure to light suited to the individual's life cycle can help maintain optimal health.

[0031] Furthermore, workers can easily ascertain the elapsed time since the start of work from the state of the light-emitting unit 45. This can improve work efficiency and reduce overtime. It also allows people around them to notice excessive work, promoting work sharing. Furthermore, providing a lighting environment that is favorable to the users' biological rhythms is generally limited to some offices, hospitals, nursing homes, and the like. In contrast, this embodiment can achieve the above-mentioned attendance and labor effects, and is therefore expected to promote the introduction of lighting systems 100 that are suited to biological rhythms.

[0032] In this embodiment, as an example, a plurality of detection devices 20 are provided corresponding to a plurality of seats 80, and each detection device 20 transmits information identifying the seat 80 corresponding to that detection device 20 to the lighting control device 10. The lighting control device 10 then controls the light-emitting unit 45 corresponding to the seat 80 identified by the received information. Therefore, even if a free address system is implemented in the office or if there is a seat change, it is possible to easily control the light-emitting unit 45 according to the elapsed time since the start of work.

[0033] Furthermore, the lighting system 100 according to this embodiment may be applied to an environment in which each worker moves between seats 80 throughout the day depending on the nature of their work, etc. When the worker moves between seats 80, they hold their employee ID card over the detection device 20 of the new seat 80. This allows the work start time detection unit 13 to acquire personal information identifying the individual currently occupying each of the multiple seats 80. The lighting control unit 14 reduces the luminous flux and color temperature emitted by the light-emitting unit 45 corresponding to the seat 80 currently occupied by the individual as the elapsed time since the start of work for the individual identified by the personal information increases. This allows a lighting environment suitable for the worker to be provided regardless of where the worker is sitting.

[0034] In addition, since the multiple light-emitting units 45 in the lighting fixture 40 are controlled separately, it is expected that the color temperatures of the covers of the multiple light-emitting units 45 will be different from each other. However, on the desk surface, the light from the multiple light-emitting units 45 is mixed, so the worker will not feel uncomfortable.

[0035] In this embodiment, lighting control device 10 reduces the luminous flux and color temperature emitted by light-emitting unit 45 in accordance with the time elapsed since the start of work. As a variation of this, lighting control device 10 may reduce at least one of the luminous flux or color temperature emitted by light-emitting unit 45 corresponding to an individual's seat as the time elapsed since the start of work increases. For example, if reducing either the luminous flux or color temperature in accordance with the time elapsed since the start of work can have the effect of regulating biological rhythms, such control may be adopted.

[0036] In the example of FIG. 5, the color temperature and luminous flux of the light-emitting unit 45 decrease in a stepwise manner. However, the color temperature and luminous flux may change continuously over a predetermined period of time. The predetermined period of time may be, for example, several seconds to several minutes. The change in color temperature and luminous flux over time may be a smooth curve or a straight line. When external light enters the illumination space, the luminous flux emitted by the light-emitting unit 45 may be reduced to obtain an appropriate illuminance.

[0037] Furthermore, the lighting control unit 14 may set the light-emitting unit 45 to a predetermined luminous flux regardless of the timetable after a predetermined time. For example, even for a flextime employee who starts work later, the illuminance of the light-emitting unit 45 may be set to an appropriate melanopic illuminance after 8:00 PM. The lighting control unit 14 may also issue a warning by, for example, flashing the light-emitting unit 45 if an individual's working hours violate work rules. Examples of violations of work rules include not ensuring rest periods during interval work or working consecutive hours after working an overnight shift.

[0038] Furthermore, as described above, the lighting control device 10 may be linked to an employment management system. Data such as work start time and personal information handled by the lighting control device 10 may be the clock-in / clock-out data of the employment management system. For example, the time when an employee holds their employee ID card over the terminal of the employment management system when entering the workforce may be used as the work start time. Alternatively, the time when the employee starts up their PC may be used as the work start time.

[0039] Information on the work start time may also be acquired by the detection device 20. In this case, it is assumed that one employee will hold their employee ID card over multiple detection devices 20 multiple times a day. In this case, the time when the employee ID card is held over for the first time that day may be acquired as the work start time.

[0040] Furthermore, the configuration of lighting fixtures 40 is not limited to those shown in Figures 1 to 4. For example, lighting fixtures 40 do not need to be spaced at 2.4 m intervals as long as a light-emitting unit 45 can be secured for each desk. Furthermore, lighting fixtures 40 may have one or more light-emitting units 45. In other words, multiple lighting fixtures 40 may be provided to correspond to multiple seats 80. Furthermore, lighting control device 10 may control multiple lighting fixtures 40. The light distribution of light-emitting unit 45 may be diffused, or may be concentrated or spot light. Concentrated or spot light increases the contribution of the light emitted by each light-emitting unit 45 to each individual.

[0041] The detection device 20 is not limited to a card reader, but may be a beacon, a retina authentication device, a face authentication device, or a fingerprint authentication device. For example, a PC camera can be used as the retina authentication device or the face authentication device.

[0042] In the lighting control device 10, the functions of the communication unit 11, identification unit 12, work start time detection unit 13, and lighting control unit 14 shown in Fig. 1 can be realized by a control device such as a processor, a CPU (Central Processing Unit), or a microcomputer. The function of the storage unit 15 can be realized by a memory such as a non-volatile memory. The control device executes a program stored in the storage unit 15, for example. That is, the storage unit 15 stores a program that reduces at least one of the luminous flux or color temperature emitted by the light-emitting unit 45 corresponding to the individual's seat 80 as the elapsed time since the individual's work start increases.

[0043] The functions of lighting control device 10 may also be implemented by controller 30. That is, communication unit 11, identification unit 12, work start time detection unit 13, lighting control unit 14, and memory unit 15 may be provided in controller 30. Furthermore, lighting control device 10 and controller 30 may be a single device. Furthermore, the number of controllers 30 per floor does not necessarily have to be one.

[0044] These modifications can be applied as appropriate to the lighting control devices, lighting systems, lighting fixtures, and lighting fixture control methods according to the following embodiments. Note that the lighting control devices, lighting systems, lighting fixtures, and lighting fixture control methods according to the following embodiments have much in common with embodiment 1, so the following description will focus on the differences from embodiment 1.

[0045] Embodiment 2 6 is a block diagram of a lighting system 200 according to embodiment 2. In this embodiment, the arrangement of the detection devices 20 is different from that in embodiment 1. The detection devices 20 do not have to be provided to correspond to a plurality of seats 80. For example, one detection device 20 may be provided to be shared by a plurality of individuals.

[0046] Detection device 20 of this embodiment acquires personal information. Furthermore, memory unit 15 of lighting control device 10 stores correspondence relationships between personal information and multiple light-emitting units 45. Identification unit 12 identifies light-emitting unit 45 corresponding to the personal information acquired by detection device 20 based on the correspondence relationships stored in memory unit 15. Lighting control unit 14 reduces the luminous flux and color temperature emitted by light-emitting unit 45 corresponding to the personal information as the elapsed time since the start of work of the individual identified by the personal information increases.

[0047] The technical features described in each embodiment may be used in appropriate combination. [Explanation of symbols]

[0048] 10 Lighting control device, 11 Communication unit, 12 Identification unit, 13 Work start time detection unit, 14 Lighting control unit, 15 Memory unit, 20 Detection device, 30 Controller, 40 Lighting fixture, 41 Lighting device, 42 Lighting circuit, 43 Control unit, 44 Communication unit, 45 Light-emitting unit, 45a Light source, 80 Seat, 100 Lighting system, 200 Lighting system

Claims

1. a control unit configured to reduce at least one of the luminous flux and the color temperature emitted by a light-emitting unit corresponding to the seat of the individual among the plurality of light-emitting units as the elapsed time from the start of work of the individual increases, The control unit reduces at least one of the luminous flux or color temperature emitted by the light-emitting unit corresponding to the individual's seat according to a timetable as the elapsed time from the start of work for the individual increases, and after a predetermined time, sets the light-emitting unit to a predetermined luminous flux regardless of the timetable.

2. a storage unit that stores a correspondence relationship between a plurality of seats and the plurality of light-emitting units; The lighting control device described in claim 1, characterized in that the control unit, based on the correspondence relationship, reduces at least one of the luminous flux or color temperature emitted by the light-emitting unit corresponding to each of the plurality of seats as the elapsed time since the start of work of the individual using the seat increases.

3. The lighting control device described in claim 2, characterized in that the control unit acquires personal information for each of the plurality of seats that identifies the individual currently occupying the seat, and reduces at least one of the luminous flux or color temperature emitted by the light-emitting unit corresponding to the seat as the elapsed time since the start of work of the individual identified by the personal information increases.

4. a storage unit that stores a correspondence relationship between personal information that identifies the individual and the plurality of light-emitting units; 2. The lighting control device according to claim 1, wherein the control unit, based on the correspondence relationship, reduces at least one of the luminous flux or color temperature emitted by the light-emitting unit corresponding to the personal information as the elapsed time since the start of work of the individual identified by the personal information received from the outside increases.

5. A control unit is provided which, as the time elapsed since an individual started working increases, reduces at least one of the luminous flux or color temperature emitted by a light-emitting unit among a plurality of light-emitting units corresponding to the individual's seat; The control unit reduces at least one of the luminous flux or color temperature emitted by the light-emitting unit corresponding to the individual's seat according to a timetable as the elapsed time since the individual's work start time increases, and when the individual is absent, controls the light-emitting unit corresponding to the individual's seat according to a basic timetable regardless of the individual's work start time.

6. The lighting control device according to claim 5 , wherein the basic timetable is a timetable in which the individual comes to work at a regular time.

7. a plurality of light emitting units provided corresponding to a plurality of seats; a lighting control device that reduces at least one of the luminous flux and the color temperature emitted by a light-emitting unit corresponding to the seat of the individual among the plurality of light-emitting units as the elapsed time from the start of work of the individual increases; Equipped with The lighting control device reduces at least one of the luminous flux or color temperature emitted by the light-emitting unit corresponding to the individual's seat according to a timetable as the elapsed time from the start of work for the individual increases, and after a predetermined time, sets the light-emitting unit to a predetermined luminous flux regardless of the timetable.

8. a plurality of detection devices provided corresponding to the plurality of seats; each of the plurality of detection devices acquires personal information identifying an individual using the corresponding seat; The lighting system according to claim 7, wherein the lighting control device reduces at least one of the luminous flux or color temperature emitted by the light-emitting unit corresponding to the corresponding seat as the elapsed time since the start of work of the individual identified by the personal information increases.

9. A light-emitting portion; a lighting circuit for lighting the light emitting unit; a control unit that controls the lighting circuit so as to reduce at least one of the luminous flux and the color temperature emitted by the light-emitting unit as the elapsed time from the start of work of an individual using the seat corresponding to the light-emitting unit increases; Equipped with The control unit reduces at least one of the luminous flux or color temperature emitted by the light-emitting unit according to a timetable as the elapsed time from the start of work of the individual increases, and after a predetermined time, sets the light-emitting unit to a predetermined luminous flux regardless of the timetable.

10. Detecting a work start time for an individual; identifying a light emitting unit corresponding to the individual's seat; decreasing at least one of the luminous flux and the color temperature emitted by the specified light-emitting unit as the elapsed time from the work start time increases; Equipped with A method for controlling a lighting fixture, characterized in that at least one of the luminous flux or color temperature emitted by the specified light-emitting unit is reduced as the time that has elapsed since the start of work for the individual increases according to a timetable, and after a predetermined time, the light-emitting unit is set to a predetermined luminous flux regardless of the timetable.

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