Patent ID: 8310144

Claim:
An illumination system comprising: a light emitting diode for emitting light of a first primary color; a light exit window for emitting light from the illumination system; and a luminescent layer arranged between the light emitting diode and the light exit window for converting at least a part of the light emitted by the light emitting diode into light of a second primary color, the luminescent layer including one of 1) a garnet luminescent material including Lutetium, Cerium, Silicon and Nitrogen enabling a shift of a center wavelength of the second primary color to increase a color temperature, or 2) a combination of a garnet luminescent material including Lutetium and Cerium and a garnet luminescent material including Cerium and at least one of Yttrium and Gadolinium, the combination enabling tuning of a color point of the emitted light to correspond to a predefined value, correct for variations in a color filter, and the color temperature to be at a predefined level.