Patent ID: 8264448

Claim:
An illumination control apparatus for a solid state lighting system with compensation for spectral changes due to temperature variation, the apparatus comprising: a memory configured to store a plurality of parameters corresponding to a predetermined range of temperatures, wherein the solid state lighting system is configured to have a first emitted spectrum at a selected intensity level and at a selected temperature, wherein a first electrical biasing for the solid state lighting system produces a first wavelength shift, and wherein a second electrical biasing for the solid state lighting system produces a second, opposing wavelength shift; and a controller coupled to the memory, wherein the controller is configured to: determine a temperature associated with the solid state lighting system; retrieve from the memory a parameter from the plurality of parameters, wherein the parameter corresponds to the determined temperature; and convert the parameter into a first control signal to provide a combined first electrical biasing and second electrical biasing to the solid state lighting system to thereby generate emitted light having a second emitted spectrum over the predetermined range of temperatures and within a predetermined variance of the first emitted spectrum.