File:Hill Air Force Base sulfur lamps.jpg

Description English: Photo of sulfur lamps and light pipes at Hill Air Force Base in Ogden, Utah. Date 	22 April 2006 (original upload date) Source 	Photo from a report by the U. S. Department of Energy. http://www.eere.doe.gov/buildings/emergingtech/pdfs/hafbrpt.pdf Author 	The original uploader was SDC at English Wikipedia. Permission (Reusing this file) 	EERE materials in the public domain per http://www1.eere.energy.gov/webpolicies/ Licensing Public domain 	This image is a work of a United States Department of Energy (or predecessor organization) employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image is in the public domain.

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