Patent ID: 8360603

Claim:
A lighting fixture, for emitting visible light and adapted to provide lighting in an area to be inhabited by a person, the lighting fixture comprising: an optical integrating cavity comprising a diffusely reflective inner surface and at least one optical passage enabling emission of integrated light out of the cavity; a first light emitting diode (LED) comprising an enclosure and a semiconductor chip contained within the enclosure, the first LED coupled for emitting radiant energy of a first wavelength into the cavity; a second light emitting diode (LED) comprising an enclosure and a semiconductor chip contained within the enclosure, the second LED coupled for emitting radiant energy of a second wavelength into the cavity; a first coating layer containing at least one first phosphor, extending across a portion of the diffusely reflective inner surface of the cavity, the at least one first phosphor being of a type excited by radiant energy of the first wavelength, but not the second wavelength, for emission of visible light for reflection, wherein the diffusely reflective inner surface of the cavity is outside the enclosures of the LEDs.