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Energy efficient tra...

Energy efficient traditional incandescent light bulbs #ledlights #lighting #laboratory #testing www.bbc.com/news/science-environment-35284112

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Uploaded on January 12, 2016

Energy efficient tra...

Energy efficient traditional incandescent light bulbs #ledlights #lighting #laboratory #testing www.bbc.com/news/science-environment-35284112

100 views
0 faves
0 comments
Uploaded on January 12, 2016
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