There is provided a blue-green illumination system, comprising a light emitting diode, and a luminescent material having emission CIE color coordinates located within an area of a of a pentagon on a CIE chromaticity diagram, whose corners have the following CIE color coordinates:...http://www.google.de/patents/US6555958?utm_source=gb-gplus-sharePatent US6555958 - Phosphor for down converting ultraviolet light of LEDs to blue-green light
