Illuminating device

An illuminating device comprising:

• a light source configured to include plural light emitters, each having a different spectral distribution;
• a light source control unit configured to determine an emission intensity of each of the light emitters, and control the light emitters to have the emission intensities;
• an estimation unit configured to estimate a spectral reflectivity of an object to which illuminating light is irradiated from the light source;
• a first calculating unit configured to calculate a first evaluation value, indicating an adequacy of a color of the object visually perceived, based on the spectral distributions and the spectral reflectivity;
• and
• a second calculating unit configured to calculate a second evaluation value, indicating how much an influence is given by the illuminating light to factors other than a visual sense, based on the spectral distributions,
• wherein the light source control unit determines the emission intensities by which the first evaluation value and the second evaluation value satisfy a restraint condition determined beforehand.