How low can you go?

krp

Member
Just got my canopy built. I upgraded my lights for my 55gal from pc to 2 x 250 watt metal halide.
I have slowely been lowering the canopy over the last week to let everything acclimate.
Does anyone know the coverage area of a 250 watt metal halide bulb?
I am wondering how high I can keep the lights off of the water to help with heat issues.
Thanks
 
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