How high to hang light

[SaltyTX]

I have a 3' 8 bulb tek light to put above a 90g tank.

How high above the water should I mount it?

Yes, I know its 3' over a 4' tank, but its tons of light and I feel it will be sufficient (as do others here..)

I may build a canopy or may just hang it, not sure yet, depends on height above water.


Thanks in advance.

[YE||0W TA|\|G]

I think this is one of those topics where you will find a variety of answers. I currently have a 6ft MH fixture thats ruffly 6-8 inches off the surface on my tank. Ive also seen lights as high as a foot or higher from the surface

[THE ROOK]

Start high & lower as the corals get acclimated.

[SaltyTX]

OK.

What about sheilding the lights from evaporation/salt? How do you handle that? find some glass to put right under the fixture?

I mean 6-8 inches above the surface is bound to get some salt coverage over time, ya?

[MTB]

My halides are 8 inches above the water and get very minimal salt spray. I have to clean the protective glass once a month at most.

[zackdastack]

it is true you can get away with mounting it a little higher than expected