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The U.S. DOE recently released a GATEWAY report on a parking-garage demonstration conducted at U.S. Department of Labor (DOL) headquarters in Washington, DC, which serves as a classic illustration of the savings that can result from switching to SSL -- and how the use of occupancy-sensor controls can increase those savings. Parking garages often present attractive energy-saving opportunities when safety and security demand that they be lighted 24/7, regardless of actual building use.