ILLUMINATION SYSTEM AND ILLUMINATION METHOD

摘要

The illumination system according to an embodiment of the invention has a plurality of white light sources satisfying the relationship -0.2 ≤ [(P(λ) × V(λ))/(P(λmax1) × V(λmax1)) - (B(λ) × V(λ))/(B(λmax2) × V(λmax2))] ≤ +0.2, where P(λ) is the emission spectrum of a white light source having a specific correlated color temperature on a black body radiation trajectory, B(λ) is the emission spectrum of a black body radiation of the corresponding color temperature, V(λ) is the spectrum of the spectral luminous efficiency, λmax1 is the wavelength at which P(λ) × V(λ) is maximum, and λmax2 is the wavelength at which B(λ) × V(λ) is maximum. Each of the white light sources is a white light source of different color temperature, and constituted in such a manner that the light from each of the white light sources is irradiated from a different direction onto an object to be illuminated.