We established a model for spectra of LEDs at different drive currents. The simulation program of color rendering of white-light LED clusters has been developed, according to the principle of additive color mixture. The experimental results show that white/red LED clusters can realize color temperature untunable white light with a high color rendering index and high luminous efficacy and that neutral-white/red/blue LED clusters can realize color temperature tunable white light with a high color rendering index and high luminous efficacy.
© 2010 Optical Society of America
Original Manuscript: May 19, 2010
Revised Manuscript: July 27, 2010
Manuscript Accepted: August 1, 2010
Published: August 26, 2010
Vol. 5, Iss. 13 Virtual Journal for Biomedical Optics
Guoxing He and Lihong Zheng, "White-light LED clusters with high color rendering," Opt. Lett. 35, 2955-2957 (2010)