Patent ID: 8643038

Claim:
A light emitting device, comprising: a light emitting diode that emits light having a dominant wavelength in the blue color range; a recipient luminophoric medium on the light emitting diode for down-converting at least some of the radiation emitted by the light emitting diode, the luminophoric medium including: a Lu 3 Al 5 O 12 :Ce phosphor that does not include yttrium, the Lu 3 Al 5 O 12 :Ce phosphor configured to down-convert the radiation emitted by the light emitting diode to radiation having a peak wavelength between 525 nanometers and 550 nanometers and that has a full width half maximum emission bandwidth that extends below 500 nanometers; a Y 3 Al 5 O 12 :Ce phosphor that does not include lutetium, the Y 3 Al 5 O 12 :Ce phosphor configured to down-convert the radiation emitted by the light emitting diode to radiation having a peak wavelength between 530 nanometers and 580 nanometers; and an additional material that down-converts the radiation emitted by the light emitting diode to radiation having a peak wavelength between 630 nanometers and 650 nanometers, wherein the Lu 3 Al 5 O 12 :Ce phosphor consists of a plurality of Lu 3 Al 5 O 12 :Ce phosphor particles and the Y 3 Al 5 O 12 :Ce phosphor consists of a plurality of Y 3 Al 5 O 12 :Ce phosphor particles, and wherein a ratio of the Lu 3 Al 5 O 12 :Ce phosphor to the Y 3 Al 5 O 12 :Ce phosphor is between 1:3 and 3:1 by weight.