File:LampEfficiency.JPG
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Summary
A diagram of Lamp Efficiency at the National Museum of American History in Washington, DC. Self made photo, and diagram is work of the US govt, therefore in public domain.
Licensing
 | This work is in the public domain in the United States because it is a work of the United States Federal Government under the terms of Title 17, Chapter 1, Section 105 of the US Code. See Copyright. Note: This only applies to works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the United States Postal Service since 1978. (See 206.02(b) of Compendium II: Copyright Office Practices). | .svg) |
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File usage
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