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Published on January 12th, 2009 | by Ariel Schwartz

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Researchers Develop Super-Efficient LED Light

January 12th, 2009 by  


led light

LED light bulbs are already more efficient than your average bulb, but researchers at the Renssalaer Polytechnic Institute have developed a new kind of LED that exhibits both improved energy efficiency and lighting performance. The researchers‘ polarization-matching LED shows an 18 percent increase in light output and a 22 percent increase in wall plug efficiency (the amount of electricity that the LED converts into light).

Renssalaer’s LED is more powerful thanks to a reduction in “efficiency droop”, which makes LEDs most efficient when receiving low-density electrical currents and least efficient when higher density electrical currents are received.

The research team figured out that the region of the LED where light is generated contains materials with mismatched polarization. By reducing the polarization mismatch, electron leakage can also be reduced, thus increasing energy efficiency. So Renssalaer’s researchers introduced a new design with better matched polarization. As expected, they saw a reduction in efficiency droop and electron leakage.

Since LED lights are not yet entirely mainstream, advances made now can easily be implemented in both current and future LED installations.

Photo Credit: CC licensed by Flickr user ninjabong 
 


 


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About the Author

was formerly the editor of CleanTechnica and is a senior editor at Co.Exist. She has contributed to SF Weekly, Popular Science, Inhabitat, Greenbiz, NBC Bay Area, GOOD Magazine, and more. A graduate of Vassar College, she has previously worked in publishing, organic farming, documentary film, and newspaper journalism. Her interests include permaculture, hiking, skiing, music, relocalization, and cob (the building material). She currently resides in San Francisco, CA.



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