The Planted Tank Forum - View Single Post - Which LEDs for planted tank?
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Old 08-01-2011, 09:26 PM   #6
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LEDs are more than capable of growing plants (I use them exclusively for plants).

Over a 48X16X20, using quality PAR30 bulbs, I think you'd need a minimum of 3 of them using optic angles no more narrow than 60 degrees (unless you can raise it way up high, like 20-30" over the tank).

Go with all cool white (6500K).
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