Patent ID: 8772691

Claim:
A lighting device, comprising: at least one thermal conduction element; a plurality of solid state light emitters, wherein the plurality of solid state light emitters comprise multiple LED light sources for emitting multiple, different spectral characteristics of light; at least a first reflective element, wherein the first reflective element is white, highly diffusely reflective and forms an optical integrating cavity for combining light from the LED light sources; at least one conical deflector having a specular reflective inner surface coupled to an output aperture of the optical integrating cavity; a control circuit for controlling the LED light sources to provide a predetermined characteristic in the combined light for output from the lighting device; and a sensor for sensing a parameter during operation of the lighting device, wherein the control by the control circuit is responsive to the parameter sensed by the sensor, wherein said solid state light emitters are mounted on at least a first portion of said thermal conduction element and said first reflective element is positioned such that at least a portion of light emitted from at least one of said solid state light emitters is reflected by said first reflective element, and wherein a second portion of said thermal conduction element is exposed to ambient air.