03-19-2011, 02:46 PM
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Originally Posted by 1077
Is this for planted tank? If so, You would in my view, need to raise this fixture 18 to 24 inches above the tank unless you wish to grow algae and lot's of it.
Even with pressurized CO2, this would be a lot of light for 16 inches to substrate.
Erm, double check the forum you posted that in.
I seriously doubt it's going to be planted.
I'm pretty sure that's a LOT of light, but you could always move the light higher over the tank to lessen the light...
Google 'inverse square law'.