JP2024150907A - Lighting System - Google Patents

Abstract

[Problem] To provide a lighting system that allows a user to feel a difference in correlated color temperature between a ceiling surface and a wall surface. [Solution] The lighting system includes at least one or more first lighting fixtures that are installed on a ceiling surface and have a variable correlated color temperature of emitted light, at least one or more second lighting fixtures that are installed on the wall surface or on the ceiling surface near the wall surface so that part of the emitted light illuminates the wall surface and have a variable correlated color temperature of emitted light, and a lighting control device that independently controls the correlated color temperature of the light emitted from the first lighting fixture and the correlated color temperature of the light emitted from the second lighting fixture, the lighting control device controls the correlated color temperature of the second lighting fixture so that a preset difference occurs with respect to the first correlated color temperature, and controls the correlated color temperature of the second lighting fixture to be 100 K or more lower than the correlated color temperature of the first lighting fixture when the correlated color temperature of the first lighting fixture is in the range of 2000 K to 3000 K. [Selected Figure] Figure 1

Description

This disclosure relates to a lighting system that can produce a "sunset" lighting effect.

Natural "sunsets" are thought to have a particularly soothing effect on people's minds. Because "sunsets" are a natural phenomenon, not only do they look different depending on the shape of the horizon, mountain ranges, and cityscapes in different locations, but everyone knows that they look incredibly different due to factors such as the amount of cloud cover or changes in scattering caused by humidity.

Conventionally, lighting fixtures have been proposed that can produce a "sunset" light effect (see, for example, Patent Document 1). In addition to a main light source that emits white light, the lighting fixture of Patent Document 1 has an auxiliary light source equipped with red, green, and blue light-emitting elements that can provide colored illumination, and the auxiliary light source emits colored light that corresponds to the change in color of the sky at each time of day, for example, reproducing a blue sky during the day and a sunset sky in the evening on the light-emitting surface. Conventionally, a control method has been proposed in which lighting fixtures are installed on the ceiling and walls of a room, and the light from these lighting fixtures is effectively controlled to evoke a "sunset."

JP 2021-089902 A

In the conventional control method described above, lighting fixtures installed on the ceiling and lighting fixtures installed on the walls of the room are controlled, but because these lighting fixtures are controlled by the same correlated color temperature control, they have almost the same correlated color temperature, which creates the problem that users do not perceive a difference in the correlated color temperature between the ceiling and walls of the room and perceive the lighting as homogeneous.

This disclosure has been made to solve the above problems, and aims to provide a lighting system that allows the user to perceive a difference in correlated color temperature between the ceiling surface and the wall surface more clearly than ever before.

The lighting system according to the present disclosure includes at least one or more first lighting fixtures that are installed on a ceiling surface and have a variable correlated color temperature of emitted light, at least one or more second lighting fixtures that are installed on the wall surface or on the ceiling surface near the wall surface so that a portion of the emitted light illuminates the wall surface and have a variable correlated color temperature of emitted light, and a lighting control device that independently controls the correlated color temperature of the light emitted from the first lighting fixture and the correlated color temperature of the light emitted from the second lighting fixture, and the lighting control device controls the correlated color temperature of the light emitted from the second lighting fixture so that a predetermined difference occurs with respect to the correlated color temperature of the light emitted from the first lighting fixture, and controls the correlated color temperature of the light emitted from the second lighting fixture to be 100 K or more lower than the correlated color temperature of the light emitted from the first lighting fixture when the correlated color temperature of the light emitted from the first lighting fixture is in the range of 2000 K or more and 3000 K or less.

According to the lighting system of the present disclosure, when the correlated color temperature of the light emitted from the first lighting fixture is in the range of 2000K to 3000K, the correlated color temperature of the light emitted from the second lighting fixture is controlled to be 100K or more lower than the correlated color temperature of the light emitted from the first lighting fixture. In this way, the correlated color temperature of each lighting fixture can be appropriately controlled, and the user can feel a difference in the correlated color temperature between the ceiling surface and the wall surface more than before.

FIG. 1 is a diagram illustrating an example of a configuration of a lighting system according to an embodiment. FIG. 2 is a diagram showing details of a first lighting fixture of the lighting system according to the embodiment. 11A and 11B are diagrams illustrating a method of installing a second lighting device in the lighting system according to the embodiment. 13A and 13B are diagrams illustrating a modified example of a method for installing the second lighting device in the lighting system according to the embodiment. FIG. 2 is a block diagram specifically showing control, illustrating a control method for a lighting system according to an embodiment. FIG. 2 is an enlarged view of a main portion of the xy chromaticity diagram. FIG. 13 is a diagram showing a modified example of the configuration of the lighting system according to the embodiment.

Below, an embodiment of the present disclosure will be described with reference to the drawings. Note that the present disclosure is not limited to the embodiment described below. Also, the size relationships of the components in the following drawings may differ from the actual ones.

Embodiment
Fig. 1 is a diagram showing an example of a configuration of a lighting system according to an embodiment. Fig. 2 is a diagram showing details of a first lighting fixture 10 of the lighting system according to the embodiment. Fig. 3 is a diagram showing a method of installing a second lighting fixture 20 of the lighting system according to the embodiment.

As shown in FIG. 1, the lighting system according to the embodiment includes a first lighting fixture 10 that is circular in plan view and whose correlated color temperature (1800K to 12000K) of emitted light and whose output power of emitted light can be controlled independently, and a second lighting fixture 20 that is rectangular in plan view and whose correlated color temperature (1800K to 12000K) of emitted light and whose output power of emitted light can be controlled independently and that can also be controlled independently from the first lighting fixture 10. The first lighting fixture 10 is a ceiling-type ceiling light that is installed on the ceiling surface C of the room. The second lighting fixture 20 is an indirect lighting-type wall light that is installed in a position that cannot be directly seen from inside the room, in a structure called a cornice (hereinafter also referred to as a cornice-type structure) on the ceiling surface C close to the wall surface W of the room, as shown in FIG. 3. Note that the interior referred to here is a space where people relax or work under the lighting, such as a living room at home, a hotel lobby or guest room, an office, or a classroom, and is not a space intended for production purposes, such as a stage.

2, the first lighting fixture 10 includes a main body 11 having two or more types of LEDs with different correlated color temperatures of emitted light as light sources, a light-transmitting cover 12 that has diffusive properties and is attached to the main body 11, and a frame 13 that is attached to the outer periphery of the light-transmitting cover 12. Although not shown, the main body 11 includes, from the members close to the ceiling surface C side, a substantially circular main body base, a sensor, an insulating plate, a power supply board surrounded by the main body base and a heat sink, a heat sink attached to the main body base, a light source board attached to the heat sink, a reflective sheet, an LED cover that covers the light source board, and a reflective cover.

The LEDs of the first lighting device 10 are configured to emit light through the corresponding dome-shaped portions. In the embodiment, a pair of LEDs is housed in one dome-shaped portion, but the number of LEDs housed in the dome-shaped portion is not particularly limited. For example, one of the pair of LEDs is a white LED that emits a luminous flux of daylight white (correlated color temperature 5000K), and the other is an incandescent LED that emits a luminous flux of incandescent white (correlated color temperature 2500K). As these LEDs, for example, a blue LED that emits a blue luminous flux combined with a yellow phosphor to emit daylight white light and incandescent light can be appropriately used.

Figure 4 is a diagram showing a modified example of the installation method of the second lighting fixture 20 of the lighting system according to the embodiment. In the embodiment, as shown in Figure 3, the second lighting fixture 20, which is elongated and separate from the first lighting fixture 10, is installed in a structure called a cornice on the ceiling surface C close to the wall surface W, but this is not limited to this. For example, as shown in Figure 4, the second lighting fixture 20 may be installed in a structure called a downward light-emitting cove (hereinafter also referred to as a cove-type structure) in which the light-emitting part is difficult to see on the wall surface W close to the floor surface F, and the second lighting fixture 20 may be installed along the wall surface W. In addition, the second lighting fixture 20 has an elongated shape, but is not limited to this shape and may be composed of only a light source.

Figure 5 is a block diagram specialized for control showing a control method of a lighting system according to an embodiment. In Figure 5, in order to distinguish between the multiple first lighting fixtures 10 and the multiple second lighting fixtures 20, a "-number" is added to the end of each. At least one or more first lighting fixtures 10 (10-1, 10-2, ...) installed on the ceiling surface C are controlled by a first light output control means 52 that controls the output of emitted light and a first correlated color temperature control means 53 that controls the correlated color temperature of the emitted light. In other words, the first light output control means 52 and the first correlated color temperature control means 53 are configured to be able to communicate with the first lighting fixtures 10 (10-1, 10-2, ...). These first light output control means 52 and first correlated color temperature control means 53 are controlled by a first lighting control means 51 that is higher than them. In other words, the first lighting control means 51 is configured to be able to communicate with the first light output control means 52 and the first correlated color temperature control means 53.

In addition, at least one or more second lighting fixtures 20 (20-1, 20-2, ...) generally installed on the wall surface W are controlled by a second light output control means 55 that controls the output of emitted light and a second correlated color temperature control means 56 that controls the correlated color temperature of the emitted light. In other words, the second light output control means 55 and the second correlated color temperature control means 56 are configured to be able to communicate with the second lighting fixtures 20 (20-1, 20-2, ...). These second light output control means 55 and second correlated color temperature control means 56 are controlled by a higher-level second lighting control means 54. In other words, the second lighting control means 54 is configured to be able to communicate with the second light output control means 55 and the second correlated color temperature control means 56. In addition, the first lighting control means 51 and the second lighting control means 54 are controlled by a higher-level lighting control device 50. That is, the lighting control device 50 is configured to be able to communicate with the first lighting control means 51 and the second lighting control means 54. Therefore, the lighting control device 50 independently controls the output and correlated color temperature of light emitted from a first lighting device group consisting of one or more first lighting devices 10 and a second lighting device group consisting of one or more second lighting devices 20.

The lighting control device 50, the first lighting control means 51, the first light output control means 52, the first correlated color temperature control means 53, the second lighting control means 54, the second light output control means 55, and the second correlated color temperature control means 56 are configured, for example, by dedicated hardware or a CPU (also called a central processing unit, processing unit, arithmetic unit, microprocessor, or processor) that executes a program stored in a memory unit (not shown). The lighting control device 50 will be described below, but the same is true for the first lighting control means 51, the first light output control means 52, the first correlated color temperature control means 53, the second lighting control means 54, the second light output control means 55, and the second correlated color temperature control means 56.

When the lighting control device 50 is dedicated hardware, the lighting control device 50 is, for example, a single circuit, a composite circuit, an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or a combination of these. Each of the functional units realized by the lighting control device 50 may be realized by separate hardware, or each functional unit may be realized by a single piece of hardware.

When the lighting control device 50 is a CPU, each function executed by the lighting control device 50 is realized by software, firmware, or a combination of software and firmware. Software and firmware are written as programs and stored in a memory unit. The CPU realizes each function of the lighting control device 50 by reading and executing the programs stored in the memory unit. Here, the memory unit stores various information, and includes, for example, a non-volatile semiconductor memory that allows data to be rewritten, such as a flash memory, an EPROM, and an EEPROM.

In addition, some of the functions of the lighting control device 50 may be realized by dedicated hardware, and some by software or firmware.

Conventionally, ceiling lighting and wall lighting have been controlled by the same correlated color temperature control, resulting in almost identical correlated color temperatures, and it has been found that there is an issue in that users do not perceive any difference in the correlated color temperature.

In a simulated room with a ceiling height of 2.6 m and an area equivalent to approximately 8 tatami mats, in which the ceiling surface C and the wall surface W are both white, the inventors adjusted the correlated color temperature of the light emitted from the first lighting fixture 10, which is a ceiling light installed on the ceiling surface C as shown in FIG. 1, to 3000 K, and further adjusted the correlated color temperature of the light emitted from the second lighting fixture 20, which is a wall light with a cornice structure on the wall surface W, to 3000 K as well. The correlated color temperature of the light emitted from the first lighting fixture 10 and the second lighting fixture 20 was adjusted using a color luminance meter on the diffusion covers in front of them. In this state, the spatial presentation effect was confirmed in the simulated room by subjects of 10 men and women in their 20s to 60s. First, in the above state, almost all of the subjects did not notice any difference in color between the ceiling surface C and the wall surface W, and felt that the lighting was homogeneous.

Now, it is generally agreed that a "sunset" gives people a sense of peace and calms the mind, but in terms of spatial design, the homogeneous lighting with a correlated color temperature of 3000K was perceived as simply a room lit with incandescent light, and none of the test subjects had any particular impression of a "sunset," despite the low correlated color temperature.

The "sunset" recreated here is a scene in which the color is closer to red near the horizon, and the color temperature gradually becomes higher compared to the red described above as you move upwards.

The inventors then considered why the impression was not that of a sunset, and realized that in a sunset, the color temperature is low near the horizon and there is a gradual gradation as you move upward from the horizon, but this was not the case in the simulated room. So they then lowered the correlated color temperature of the light emitted from the second lighting fixture 20 that illuminates the wall surface W by 300K to 2700K, lower than the correlated color temperature of 3000K of the light emitted from the first lighting fixture 10, which is the ceiling light, and again asked the 10 test subjects for their opinions. Approximately half of the test subjects answered that it reminded them of a sunset.

Furthermore, an experiment was conducted to determine how much difference was required between the correlated color temperature of the light emitted from the first lighting fixture 10 and the correlated color temperature of the light emitted from the second lighting fixture 20 in order to recognize the difference in color. It was found that when the correlated color temperature of the light emitted from the first lighting fixture 10, which is a ceiling light, is in the range of 2000 to 3000 K, the difference in color can be recognized at approximately 100 K. Furthermore, it was found that when the correlated color temperature of the light emitted from the first lighting fixture 10 is in the range of 3000 to 3500 K, the difference in color can be recognized at approximately 200 K.

Figure 6 is an enlarged view of a main portion of the xy chromaticity diagram. Note that, from the blackbody locus of the xy chromaticity diagram shown in Figure 6, the smaller the correlated color temperature on the blackbody locus, the wider the range for the correlated color temperature value becomes. Therefore, when the difference in correlated color temperature is the same, it is easier to recognize the difference in color when the correlated color temperature is smaller.

In addition, if the ceiling lighting and wall lighting are more than 1500 mm apart, the light-emitting parts of both will be far apart, making it difficult to perceive the difference in color due to the difference in correlated color temperature; therefore, a distance of 1500 mm or less is preferable to fully achieve the effect of a sunset.

When a ceiling light is close to a wall W on which a wall light is installed, and the illuminance of the light from the ceiling light shining onto the wall W is higher than the illuminance of the light from the wall light shining onto the wall W, and the difference between the illuminance and the illuminance is higher than a preset threshold, the light emitted from the ceiling light on the wall W becomes stronger, and a gradation with the light emitted from the wall light is likely to be formed.

When the ceiling light is far from the wall W on which the wall light is installed, and the illuminance of the light from the ceiling light shining onto the wall W is lower than the illuminance of the light from the wall light shining onto the wall W, and the difference is lower than a preset threshold, the light emitted from the ceiling light on the wall W becomes weak, making it difficult to form a gradation that matches the light emitted from the wall light, or the light emitted from the ceiling light may not be shining onto the wall W.

For this reason, the distance between the ceiling light and the wall light is set to be the distance at which the light emitted from the ceiling light and the light emitted from the wall light form a gradation on the wall W.

As explained above, in order to evoke the image of a sunset, it is essential to control the correlated color temperature so that the color temperature of the wall lighting is lowered to a more appropriate value than the color temperature of the ceiling lighting. This has the effect of increasing the possibility of evoking the image of a soothing sunset in a space that was previously simply lit with incandescent light.

Figure 7 is a diagram showing a modified example of the configuration of the lighting system according to the embodiment. As shown in Figure 1, the lighting system according to the embodiment includes one first lighting fixture 10 and one second lighting fixture 20, the first lighting fixture 10 being a ceiling lighting fixture of a ceiling type, and the second lighting fixture 20 being a wall lighting fixture of a cornice structure, but this is not limited to this. As shown in Figure 7, the lighting system may include a first lighting fixture group consisting of a plurality of first lighting fixtures 10 and a second lighting fixture group consisting of a plurality of second lighting fixtures 20. In addition, the types of the first lighting fixture group and the second lighting fixture group are not limited to one each. In other words, for example, a ceiling lighting fixture 10a of a ceiling type and a downlight lighting fixture 10b of a downlight type may be used as the first lighting fixture group, and for example, a wall lighting fixture 20a of a cornice type structure, a wall lighting fixture 20b of a cove type structure, and a wall lighting fixture 20c of a bracket type may be used as the second lighting fixture group.

In the lighting system according to the embodiment, when the first lighting fixture 10, which is a ceiling light, and the second lighting fixture 20, which is a wall light, are dimmed independently, the difference in correlated color temperature can be maintained regardless of the relative relationship between the dimming rate of the first lighting fixture 10 and the dimming rate of the second lighting fixture 20.

The following methods can be used to control the correlated color temperature of the light emitted from the second lighting fixture 20 relative to the correlated color temperature of the light emitted from the first lighting fixture 10.

(1) The user (operator) sets it manually.
The user measures the light emitted from the first lighting device 10 with a color luminance meter, and changes the correlated color temperature of the light emitted from the second lighting device 20 so that the correlated color temperature becomes a predetermined value that is 100 K or more lower than the measured value.

(2) Set in the lighting control device 50.
The lighting control device 50 controls the light emitted from the second lighting device 20 so that the correlated color temperature of the wall lighting becomes a predetermined correlated color temperature that is 100 K or more lower than the correlated color temperature of the light emitted from the first lighting device 10. In addition, in the case of a mode for providing a scene simulating a "sunset" in the lighting space, when the lighting control device 50 is operated to change only the correlated color temperature of the light emitted from the first lighting device 10, the lighting control device 50 controls the light emitted from the second lighting device 20 so that a difference between the correlated color temperature of the light emitted from the first lighting device 10 and the correlated color temperature of the light emitted from the first lighting device 10 before and after the correlated color temperature of the light emitted from the first lighting device 10 is changed is maintained.

(3) The correlated color temperature of the wall surface W is measured and set.
A color luminance meter is mounted on the second lighting fixture 20 to measure the correlated color temperature of the light emitted from the first lighting fixture 10 onto the wall surface W, and the second lighting fixture 20 is controlled so that the correlated color temperature becomes 100 K or more lower than the correlated color temperature. When only the correlated color temperature of the light emitted from the first lighting fixture 10 is controlled by the lighting control device 50, the second lighting fixture 20 measures the correlated color temperature of the light emitted from the first lighting fixture 10 onto the wall surface W, and controls the second lighting fixture 20 so that the difference between the correlated color temperature of the light emitted from the second lighting fixture 20 and the correlated color temperature of the light emitted from the first lighting fixture 10 is maintained.

The method for controlling the correlated color temperature of the light emitted from the second lighting device 20 relative to the correlated color temperature of the light emitted from the first lighting device 10 is not limited to the above, and other control methods may be used.

Although not shown in the block diagram of FIG. 5, the first lighting fixture 10 and the second lighting fixture 20 are connected to a power supply line for driving the lighting.

In addition, to create the illusion of a changing sunset scene over time, the output of the light emitted from the second lighting device 20 may be controlled to be gradually reduced over time. This causes the gradation of light formed on the wall surface W to change over time, creating the illusion of a sunset.

The scene in which the first lighting fixture 10 and the second lighting fixture 20 form a gradation resembling a sunset on the wall surface W may be scheduled by a timer (not shown) provided in the lighting control device 50 to create a lighting space resembling a sunset in real time in the evening.

The above explanation has focused on lighting effects that evoke a sunset, but it goes without saying that the effect can be amplified by adding general sound or visual effects other than lighting.

As described above, the lighting system according to the embodiment includes at least one or more first lighting fixtures 10 that are installed on a ceiling surface C and have a variable correlated color temperature of the light emitted from them; at least one or more second lighting fixtures 20 that are installed on a wall surface W or on a ceiling surface C near the wall surface W so that a portion of the emitted light illuminates the wall surface W and have a variable correlated color temperature of the light emitted from them; and a lighting control device 50 that independently controls the correlated color temperature of the light emitted from the first lighting fixtures 10 and the correlated color temperature of the light emitted from the second lighting fixtures 20. The lighting control device 50 controls the correlated color temperature of the light emitted from the second lighting device 20 so that a preset difference occurs with respect to the correlated color temperature of the light emitted from the first lighting device 10, and controls the correlated color temperature of the light emitted from the second lighting device 20 so that the correlated color temperature of the light emitted from the first lighting device 10 is 100K or more lower than the correlated color temperature of the light emitted from the first lighting device 10 when the correlated color temperature of the light emitted from the first lighting device 10 is in the range of 2000K or more to 3000K or less.

According to the lighting system of the embodiment, when the correlated color temperature of the light emitted from the first lighting fixture 10 is in the range of 2000 K or more and 3000 K or less, the correlated color temperature of the light emitted from the second lighting fixture 20 is controlled to be 100 K or more lower than the correlated color temperature of the light emitted from the first lighting fixture 10. In this way, the correlated color temperature of each lighting fixture can be appropriately controlled, and the user can feel a difference in the correlated color temperature between the ceiling surface C and the wall surface W more than in the past.

Various aspects of this disclosure are described below.

(Appendix 1)
At least one first lighting fixture installed on a ceiling surface and capable of varying the correlated color temperature of emitted light;
at least one or more second lighting fixtures that are installed on the wall surface or on the ceiling surface near the wall surface so that a portion of emitted light illuminates the wall surface, and the correlated color temperature of the emitted light is variable;
a lighting control device that independently controls a correlated color temperature of the light emitted from the first lighting device and a correlated color temperature of the light emitted from the second lighting device,
The lighting control device includes:
a correlated color temperature of light emitted from the second lighting device is controlled to have a predetermined difference from a correlated color temperature of light emitted from the first lighting device;
When the correlated color temperature of the light emitted from the first lighting device is in the range of 2000 K or more and 3000 K or less,
a correlated color temperature of the light emitted from the second lighting device is controlled to be at least 100 K lower than the correlated color temperature of the light emitted from the first lighting device.
(Appendix 2)
The lighting control device includes:
When the correlated color temperature of the light emitted from the first lighting device is in the range of 3000 K or more and 3500 K or less,
2. The lighting system according to claim 1, wherein the correlated color temperature of the light emitted from the second lighting device is controlled to be at least 200 K lower than the correlated color temperature of the light emitted from the first lighting device.
(Appendix 3)
The lighting control device includes:
When the correlated color temperature of the light emitted from the first lighting device changes,
The lighting system described in Appendix 1 or 2, wherein the correlated color temperature of the light emitted from the second lighting device is controlled so that a difference between the correlated color temperature of the light emitted from the first lighting device and the correlated color temperature of the light emitted from the second lighting device is maintained before and after the correlated color temperature of the light emitted from the first lighting device is changed.
(Appendix 4)
The lighting control device includes:
The lighting system according to any one of appendixes 1 to 3, wherein a correlated color temperature of the light emitted from the second lighting device is controlled to be equal to or higher than 2000K and equal to or lower than 3500K.
(Appendix 5)
The first lighting fixture and the second lighting fixture are
5. The lighting system according to claim 1, wherein the first lighting device and the second lighting device are arranged so that light emitted from the first lighting device and light emitted from the second lighting device overlap each other on the wall surface.

10 First lighting fixture, 10-1 First lighting fixture-1, 10-2 First lighting fixture-2, 10a Ceiling lighting, 10b Ceiling lighting, 11 Main body, 12 Light-transmitting cover, 13 Frame, 20 Second lighting fixture, 20-1 Second lighting fixture-1, 20-2 Second lighting fixture-2, 20a Wall lighting, 20b Wall lighting, 20c Wall lighting, 50 Lighting control device, 51 First lighting control means, 52 First light output control means, 53 First correlated color temperature control means, 54 Second lighting control means, 55 Second light output control means, 56 Second correlated color temperature control means, C Ceiling surface, F Floor surface, W Wall surface.

Claims (5)

At least one first lighting fixture installed on a ceiling surface and capable of varying the correlated color temperature of emitted light;
at least one or more second lighting fixtures that are installed on the wall surface or on the ceiling surface near the wall surface so that a portion of emitted light illuminates the wall surface, and the correlated color temperature of the emitted light is variable;
a lighting control device that independently controls a correlated color temperature of light emitted from the first lighting device and a correlated color temperature of light emitted from the second lighting device,
The lighting control device includes:
a correlated color temperature of light emitted from the second lighting device is controlled to have a predetermined difference with respect to a correlated color temperature of light emitted from the first lighting device;
When the correlated color temperature of the light emitted from the first lighting device is in the range of 2000 K or more and 3000 K or less,
a correlated color temperature of the light emitted from the second lighting device is controlled to be at least 100 K lower than the correlated color temperature of the light emitted from the first lighting device. The lighting control device includes:
When the correlated color temperature of the light emitted from the first lighting device is in the range of 3000 K or more and 3500 K or less,
The lighting system according to claim 1 , wherein the correlated color temperature of the light emitted from the second lighting fixture is controlled to be at least 200 K lower than the correlated color temperature of the light emitted from the first lighting fixture. The lighting control device includes:
When the correlated color temperature of the light emitted from the first lighting device changes,
3. The lighting system according to claim 1, wherein the correlated color temperature of the light emitted from the second lighting fixture is controlled so that a difference between the correlated color temperature of the light emitted from the first lighting fixture and the correlated color temperature of the light emitted from the second lighting fixture is maintained before and after the correlated color temperature of the light emitted from the first lighting fixture is changed. The lighting control device includes:
The lighting system according to claim 1 or 2, wherein a correlated color temperature of the light emitted from the second lighting fixture is controlled to be equal to or higher than 2000K and equal to or lower than 3500K. The first lighting fixture and the second lighting fixture are
The lighting system according to claim 1 , wherein the first lighting fixture and the second lighting fixture are arranged so that light emitted from the first lighting fixture and light emitted from the second lighting fixture overlap each other on the wall surface.

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