The rapid adoption of LEDs in general illumination is fueled by high-power phosphor-conversion and direct color blue and red LED technology. Over the last several years technology development has boosted the efficacy of white high-power LEDs to greater than 100 lm/W even for devices with warm-white correlated color temperature and high color rendering index at operating conditions. In combination with advances in production cost reduction, LED-based luminaires are winning the battle against their conventional counterparts in applications where their energy efficiency, long life, and ruggedness lead to a cost of ownership advantage. This presentation will provide an overview of high-power LED technology, applications, and discuss challenges for future efficacy improvement and cost reduction. Article not available.

© 2011 Optical Society of America

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