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High power LEDs are being developed for many lighting applications, including signaling, signage, automotive (headlights and taillights) and solid state lighting. White LEDs made from blue or UV LEDs and a conversion phosphor now have efficacies in excess of 30 Lm/W in production with demonstrations of over 80 Lm/W in the lab, making them among the most energy efficient lighting sources available. To get high luminous output, high power LEDs dissipate between 1 and 5 W per package with even higher power packages (> 10 W) under development.
© 2005 Optical Society of America
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