Lighting Science Group Corporation recently notified the Department of Energy that it has developed with Light Prescriptions Innovators, LLC (LPI) a highly efficient, high output and low cost 60W replacement LED lamp, and will submit it for testing to win the Bright Tomorrow Lighting Prize (L Prize) competition. The bulb design is based on patented and patent-pending technologies developed by both companies.

The Energy Independence and Security Act of 2007 established the L Prize to promote the development of a highly efficient, high quality LED replacements for the traditional 60W light bulb—the most widely used light bulb in America. Incandescent lights are wasteful and energy-hungry—DOE estimated that lighting accounted for 25% of all electric energy use in the U.S. in 2009—offering a rapid and practical path for significant energy savings from LED lighting.

The L Prize’s stringent requirements and targets for the 60W incandescent LED replacement, as laid out by the DOE, include:

• Efficacy of more than 90 lumens (light output) per watt
• Energy consumption of less than 10 watts;
• Output of more than 900 lumens;
• Lifetime of more than 25,000 hours (25 times greater than a typical incandescent bulb);
• Color Rendering Index (CRI) greater than 90 (a high measure of lighting quality);
• Color Temperature between 2700 – 3000 degrees Kelvin; and
• An even omni-directional light distribution.

Craig DiLouie

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