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Inventor Dan Lang holds a BrightSol DLite LED bulb during the National Clean Energy Summit 5.0 at the Bellagio Tuesday, August 7, 2012. The DLite bulbs gives off the same amount of light as a 60 watt incandescent bulb but use only 9.5 watts and have an expected lifetime of 1 million hours. The bulbs should be available in stores by the end of the year and cost less than $15.00.

Steve Marcus