Lighting control system
A lighting fixture includes: one or more first light emitting devices configured to emit first light and second light for circadian rhythms; and a second light emitting device configured to emit third light having substantially effective emission wavelength in the 320 nm to 420 nm range. A correlated color temperature of the second light is higher than a correlated color temperature of the first light. A meranopic ratio of the second light is higher than a meranopic ratio of the first light.
1 . A lighting fixture comprising:
one or more first light emitting devices configured to emit first light and second light for circadian rhythms; and
a second light emitting device configured to emit third light having a substantially effective emission wavelength in a range of 320 nm to 420 nm; and
an emission controller configured to cause the one or more first light emitting devices to irradiate the first light and the second light as illumination light and cause the second light emitting device to irradiate the third light as auxiliary light, such that an illuminance of the third light is always less than an illuminance of the first light and the second light; wherein:
a correlated color temperature of the second light is higher than a correlated color temperature of the first light; and
a melanopic ratio of the second light is higher than a melanopic ratio of the first light.
2 . The lighting fixture according to claim 1 , wherein:
the first light and third light are emitted simultaneously.
3 . The lighting fixture according to claim 2 , wherein:
the second light and third light are emitted simultaneously.
4 . The lighting fixture according to claim 1 , wherein:
the second light and third light are emitted simultaneously.
5 . The lighting fixture according to claim 1 , wherein:
the correlated color temperature of the first light is 3000 K, and the melanopic ratio of the first light is less than 0.561.
6 . The lighting fixture according to claim 5 , wherein:
the correlated color temperature of the second light is 5000 K, and the melanopic ratio of the second light is more than 0.934.
7 . The lighting fixture according to claim 1 , wherein:
the correlated color temperature of the second light is 5000 K, and the melanopic ratio of the second light is more than 0.934.
8 . The lighting fixture according to claim 1 , wherein:
the correlated color temperature of the first light is 2700 K, and the melanopic ratio of the first light is less than 0.493.
9 . The lighting fixture according to claim 8 , wherein:
the correlated color temperature of the second light is 6500 K, and the melanopic ratio of the second light is more than 1.116.
10 . The lighting fixture according to claim 1 , wherein:
the correlated color temperature of the second light is 6500 K, and the melanopic ratio of the second light is more than 1.116.
11 . The lighting fixture according to claim 1 , wherein:
an irradiation of the third light is at 10 W/m 2 or less.
12 . The lighting fixture according to claim 1 , wherein:
an irradiation of the third light emitted is at 5 W/m 2 or less.
13 . The lighting fixture according to claim 1 , wherein:
the emission controller is configured to cause the second light emitting device to irradiate the third light such that the third light has a light intensity of up to 10% of a peak light intensity of light in the 420 nm to 730 nm wavelength range.
14 . A lighting fixture comprising:
one or more first light emitting devices configured to emit first light and second light for circadian rhythms; and
a second light emitting device configured to emit third light having a peak emission wavelength in a range of up to 400 nm or at least 750 nm; and
an emission controller configured to cause the one or more first light emitting devices to irradiate the first light and the second light as illumination light and cause the second light emitting device to irradiate the third light as auxiliary light, such that an illuminance of the third light is always less than an illuminance of the first light and the second light; wherein:
a correlated color temperature of the second light is higher than a correlated color temperature of the first light; and
a melanopic ratio of the second light is higher than a melanopic ratio of the first light.
15 . The lighting fixture according to claim 14 , wherein:
either the first light or the second light and third light are simultaneously irradiated.