The Planted Tank Forum - View Single Post - LED light no longer as bright
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Old 09-18-2013, 03:52 PM   #11
Legot
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I'd also say that it's the black sand and maybe the height above the tank if they are different. Remember, black absorbs all wavelengths of light, and white reflects all.

In the end, the plants are getting more light than in the taller tank.
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Last edited by Legot; 09-18-2013 at 03:53 PM.. Reason: changed
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