Light therapy apparatus

A light therapy apparatus which has

• a plurality of light sources, and
• a plurality of filters for substantially blocking, of spectrum components of light emitted from said plurality of light sources, those other than a spectrum component within a predetermined range, and
• which radiates light transmitted through said plurality of filters for substantially the same region, wherein
• said plurality of filters have characteristics of transmitting at least one of a first wavelength component having a wavelength of about 280 nm to 400 nm and a second wavelength component having a wavelength of not less than about 700 nm, while substantially blocking a wavelength component at least between the first and second wavelength components, and are used in such a combination that a wavelength component of the light to be radiated includes the first and second wavelength components.