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post #3 of (permalink) Old 03-23-2013, 02:07 AM
Planted Tank Obsessed
Join Date: Mar 2012
Location: New York City, NY
Posts: 352
Raise the lights far above the tank and its not a problem. At 30 inches they are rated for ~50umols (so high light at your substrate if the lights are 8 inches off the top of the tank) and just 30umols at 40 inches.
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