LED LAMPS WITH IMPROVED QUALITY OF LIGHT

摘要

LED lamp systems having improved light quality are disclosed. The lamps emit more than 500 lm and more than 2% of the power in the spectral power distribution is emitted within a wavelength range from about 390 nm to about 430 nm.

主权项

1. An illumination system comprising:
at least one LED device configured in a housing structure, wherein the at least one LED device comprises an n-type region, a light-emitting active region, and a p-type region; a wavelength conversion material optically coupled to the at least one LED device; and a power source electrically coupled to the at least one LED device; wherein, the at least one LED device is characterized by an external quantum efficiency greater than 45% measured at an ambient temperature of 25° C. and at a current density of 40 A/cm2; and light emitted by an interaction of electromagnetic radiation emitted from the at least one LED device and from the wavelength conversion material is characterized by a spectral power distribution (SPD) in which from 1% to 4% of the power in the SPD is emitted within a short-wavelength range from about 390 nm to about 430 nm.