Convention goers look at bulbs at the LightFair trade show Wednesday, May 18, 2011, in Philadelphia. Two leading makers of lighting products are showcasing LED bulbs that are bright enough to replace ... more 
Convention goers look at bulbs at the LightFair trade show Wednesday, May 18, 2011, in Philadelphia. Two leading makers of lighting products are showcasing LED bulbs that are bright enough to replace energy-guzzling 100-watt light bulbs set to disappear from U.S. stores in January. less 
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Associated Press | Photo By Matt Rourke
Wed, May 18, 2011 5:59 PM EDT