Patent attributes
A lighting apparatus including a controller including a real time clock, an LED driver, and an LED luminaire including a first light emitting unit including a first LED to emit light having a peak wavelength between 300 to 470 nm and a wavelength converter, and at least one of a second light emitting unit to emit light having a peak wavelength between 286 to 304 nm to cause production of vitamin D, a third light emitting unit to emit light having a peak wavelength between 605 to 935 nm to cause production of a cell activating substance, and a fourth light emitting unit to emit light having a peak wavelength between 400 to 430 nm to sterilize pathogenic microorganisms, in which the controller controls the LED driver to change an irradiance of light emitted from at least one of the light emitting units according to time.
