Quote:
Originally Posted by lastlight
i currently use one on the exact same tank and i'm happy with the coverage. it's def shadier near the top of the tank at the back but i'm fine with that. in the future i may add another when the tank is filled in as it might be needed to avoid excessive over-shading.
i'm currently ramped up to 61% output and have the light about 4 inches off the surface. i'd get much better spread lifting it higher but can't due to the glare from the unit.
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I'd lift the unit up and add some trim to the top of the tank before adding a second one. 4" is too low for this light, the minimum specified is 20cm, which is close to 8". Not to mention the trim will cost about $10 vs $1200
One light is certainly all that's needed for this size tank.