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Sources
- California Energy Commission. Lighting Efficiency. July 1, 2008. March 31, 2009. http://www.energy.ca.gov/efficiency/lighting/
- Energy Information Administration. Average Retail Price of Electricity to End Users by State. March 24, 2009. March 31, 2009. http://www.eia.doe.gov/cneaf/electricity/epm/table5_6_a.html
- Energy Star. Lighting Technologies: A Guide to Energy Efficient Illumination. August 28, 2007. March 31, 2009. http://www.energystar.gov/ia/partners/promotions/change_light/downloads/Fact%20Sheet_Lighting%20Technologies.pdf
- Rocky Mountain Institute. Lighting. 2009. March 30, 2009. http://www.northern.org/artman/publish/lighting.pdf
