Patent ID: 8045096

Claim:
A lighting unit comprising: a chassis including an opening on an irradiation plane side; first light sources and second light sources respectively having different spectroscopic characteristics, the first light sources and the second light sources being alternately arranged in a first array direction in the chassis; wherein the second light sources comprise a main light source aligned on a bottom surface of the chassis and an auxiliary light source arranged on an inner sidewall surface of the chassis; the second light sources consisting of two types of LEDs respectively having different spectroscopic characteristics, the two types of the LEDs are alternately arranged in a second array direction that is perpendicular or substantially perpendicular to the first array direction; at least one of the two types of LEDs comprises the main light source aligned on the bottom surface and the auxiliary light source arranged on the inner sidewall surface; and the first light sources and the second light sources are arranged such that light emitted only from the first light sources has uniform light intensity across an irradiation plane, and light emitted only from the second light sources has uniform light intensity across the irradiation plane.