LAS VEGAS, NV - AUGUST 01: TransCore's Richard Niell prepares a new LED light to replace a streetlight August 1, 2011 in Las Vegas, Nevada. The new energy-efficient fixtures are expected to reduce ... more 
LAS VEGAS, NV - AUGUST 01: TransCore's Richard Niell prepares a new LED light to replace a streetlight August 1, 2011 in Las Vegas, Nevada. The new energy-efficient fixtures are expected to reduce the city's annual electricity use by eight million kilowatt hours, saving about USD 400,000. The city estimates the LEDs will last about 15 years, nine years longer than the current lights. Funding for the project comes from federal energy conservation bonds and an American Recovery & Reinvestment Act grant. The city plans to replace all of its 50,000 streetlights after more funding is secured. (Photo by Ethan Miller/Getty Images) less 
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Getty Images | Photo By Ethan Miller / Getty Images
Mon, Aug 1, 2011 7:08 PM EDT