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U.S. Secretary of the Interior Ken Salazar looks over lamps with BrightSol LED bulbs 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