High efficiency low energy USA light bulb.

High efficiency low energy USA light bulb.

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Image Copyright David R. Frazier Photolibrary, Inc.

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High efficiency low energy USA light bulb.
Keywords
high efficiency, low energy, power, low watt, light, energy, electric, electricity, illuminate, glow, usa, bulb, efficient
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Credit
© David R. Frazier Photolibrary, Inc.