Patent ID: 8878450

Claim:
An emission system for producing a target chromaticity, the system comprising: a first emitter having a first plurality of solid-state transducers (SSTs) positioned to emit light having a first chromaticity; a second emitter having a second plurality of SSTs positioned to emit light having a second chromaticity different than the first chromaticity; and a controller having: a first channel with a variable output, coupled to the first emitter to adjust a brightness level of the first emitter; a second channel with a variable output, coupled to the second emitter to adjust a brightness level of the second emitter; and a computer readable memory storing instructions for controlling the variable output of the first channel and the variable output of the second channel, the instructions directing— a first set of signals to the first emitter and the second emitter to produce a combined chromaticity at a first brightness level; and a second set of signals to the first emitter and the second emitter to produce the combined chromaticity at a second brightness level, wherein the second brightness level is 50% or less of the first brightness level.