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Energy Savers: Lighting
This site describes types of artificial lighting and lighting controls so that consumers can "reduce lighting energy use by selecting lighting and sources that use energy more efficiently." Topics include lighting principles and terms (such as lumen and footcandle), indoor and outdoor lighting design methods, types of bulbs, lighting controls, lamp and ballast replacement, and lighting maintenance. From the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy (EERE).
http://www.energysavers.gov/your_home/lighting_daylighting/index.cfm/mytopic=11980

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