Lighting system and control method thereof

摘要

A lighting system according to an embodiment includes a light source unit (2) and a control circuit (110, 111, and 112) . The light source unit (2) includes a first light source (22R, 22G, and 22B), a second light source (22R, 22G, and 22B), and a third light source (22R, 22G, and 22B) . The second light source (22R, 22G, and 22B) has a color temperature different from that of the first light source. The third light source (22R, 22G, and 22B) has a color temperature different from those of the first and second light sources (22R, 22G, and 22B). The control circuit (110, 111, and 112) controls an optical output of the light source unit (2) with a predetermined color temperature by controlling the respective optical outputs of the first, second, and third light sources (22R, 22G, and 22B), and sets the optical output of the light source unit (2) when any one of the first, second, and third light sources (22R, 22G, and 22B) becomes the minimum optical output to the minimum optical output at the time of reducing the optical output of the light source unit (2) in a state where the optical output of the light source unit (2) maintains the predetermined color temperature.