Patent ID: 9559272
Date: 2017-01-31
CPC Classifications: F21K,F21V,F21Y,H01L,H05B

Claim:
1. A lighting system for emitting broad band light, comprising: a total number N of LEDs; and a light-transmissive cover member that covers the N LEDs and transmits the broad band light; wherein the N LEDs include: wherein the pump LEDs, the direct emitting short wavelength LEDs, and the direct emitting long wavelength LEDs are respectively wired for independent electrical control; wherein the broad band light transmitted by the cover member has a color that is a function of which ones of the N LEDs are energized; wherein the N LEDs are configured such that the broad band transmitted light can have a first color associated with a first group of the N LEDs being energized, and a second color associated with a second group of the N LEDs being energized; and wherein the first and second colors have a color difference of at least 0.2 in CIE chromaticity units, and wherein the first and second groups of the N LEDs each involve energizing more than half of the N LEDs.