Patent ID: 7950832

Claim:
A light emitting diode (LED) luminaire comprising: at least one light emitting module having plural kinds of LEDs emitting lights of different colors to emit a mixed-color light which is a mixture of the lights from the individual LEDs; a lens unit having a lens for directing the light from said at least one light emitting module; a light output controller for controlling an electric current fed to each of the plural kinds of said LEDs in said at least one light emitting module; a light sensor for sensing the mixed-color light from said at least one light emitting module; and a light guide for guiding the mixed-color light from the lens to the light sensor, the light guide being integrally formed in said lens unit, wherein the light sensor is configured to extract, from the mixed-color light, light levels respectively for specific colors respectively corresponding to the colors of the lights emitted from the plural kinds of the LEDs, wherein the light output controller is configured to perform feedback control on the electric current fed to each of the plural kinds of LEDs based upon the light levels extracted by the light sensor such that the light of mixed-color from said at least one light emitting module has desired chromaticity, and wherein said LED luminaire further comprises a reflector formed on the side of said lens unit and configured to reflect an external light which enters from a front surface of the lens, preventing said external light from entering into a path extending from the light guide to the light sensor.