Patent ID: 8636378
Filing Date: 2014-01-28
Classification: F21K,F21S,F21V,F21Y

Abstract:
1. A method comprising: collecting an amount of light emitted from at least one light emitting diode into a light mixing cavity, the light mixing cavity configured to surround the at least one light emitting diode such that the amount of light emitted from the at least one light emitting diode directly enters the light mixing cavity, the light mixing cavity comprising at least one reflective sidewall and an output port; a first type of wavelength converting material covering a first wavelength converting area on the at least one reflective sidewall of the light mixing cavity that is exposed to light produced by the at least one light emitting diode; positioning a color selection plate movably coupled to the at least one reflective sidewall and covering the output port, the color selection plate comprising a substrate having a plurality of areas with different wavelength converting material compositions, wherein the color selection plate is positioned to align a selected one of the plurality of areas with the output port to change a color of the light transmitted through the output port; and transmitting light from the light mixing cavity through the output port of the light mixing cavity.