LED Lighting systems are making their way into all aspects of illumination, from general to architectural to horticulture lighting. Efficiently manipulating the intensity distribution of these systems remains a challenge as the industry transitions from using traditional sources to LEDs. LEDs offer the possibility for high lumens per watt, but more importantly, they offer the ability to precisely control the intensity distribution. Ultimately, this improved optical beam control leads to more lumens at the task plane. While high lumens per watt at the LED package level has been the primary LED efficiency metric in the emerging SSL market, the ratings of LED component efficiency should not take precedence over those of total system performance.

© 2011 Optical Society of America

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