The Planted Tank Forum - View Single Post - Is this led light good enough for a 20 gallon long?
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Old 01-14-2013, 03:42 AM   #2
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No that light cannot grow anything, even on a 20 long, and especially not DHG or HC. You could get a few spiral bulbs (in different lights) or you could hang a couple of the led spotlights and get good coverage. Do you have CO2? HC will not grow without it. As far as spectrum, go around 5100K- 8000K for all around plant growth.
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