Patent ID: 8716952

Claim:
A lighting device comprising: a first group of solid state light emitters; a second group of solid state light emitters; and a third group of solid state light emitters, the first group of solid state light emitters comprising at least a first solid state light emitter, each solid state light emitter in the first group of solid state light emitters emitting light having a dominant wavelength within a range of from about 430 nm to about 490 nm, the second group of solid state light emitters comprising at least a second solid state light emitter, each solid state light emitter in the second group of solid state light emitters emitting light having a dominant wavelength within a range of from about 525 nm to about 575 nm, and the third group of solid state light emitters comprising at least a third solid state light emitter, each solid state light emitter in the third group of solid state light emitters emitting light having a dominant wavelength within a range of from about 610 nm to about 640 nm, each solid state light emitter in the second group of solid state light emitters having a dominant wavelength that differs from a dominant wavelength of each solid state light emitter in the third group of solid state light emitters by at least 70 nm.