The Planted Tank Forum - View Single Post - 29 gallon LED build
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post #15 of (permalink) Old 07-20-2011, 04:56 PM
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Join Date: Dec 2005
Location: Sacramento, CA
Posts: 20,261
I think I would use 40 degree optics, to get more PAR at the substrate, to reduce the light striking the glass, and to enhance the "shimmer" effect, if you want that. And, I would put the light a foot above the tank, because it looks good there, and it gives you good access to the tank for maintenance.

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