How high should 250w MH be above Water Surface

[Rurouni Kenshin]

I have a 29G tank and I built a hood for and the hood is 16" tall. The 250w MH will be aprox. 14" off the water is this too high?

[Rurouni Kenshin]

Help please.

[F35-Joint Strike Fighter]

Yes, it is a little hight. My MH pendent is about 6" off the water.

[Rurouni Kenshin]

Hmm, Mine isnt a pendant if that makes a diffrence, Its just a retro.

[Sharpy]

Mine are about 6" but with a tank that small you might have some heat problems with them too close, especially in the summer.

[Barky]

I have a hamilton 4 ft. fixture it sit on top of the tank it is no more than 5 inches above the water, it has plexiglas between to protech bulbs from water splash.

[jdg]

Wow, I'm about 8" from the top of the tank and about 10" from the top of the water ... guess I need to lower it some ... makes it more difficult to get large pieces of Rock in/out of the tank though :(

[Rurouni Kenshin]

Dang!!!!!!!!!! I guess I have to get my canopy cut down a lot.

[Barky]

alot has to do with depth of tank and size i have a 90gl. and it is 24 inches deep so i need to get light deeper for some corals. that is why i have mine so close to water.

[Brad524]

what about a 400 w on a 55 soon to be a 65 gallon ( 36/18/25 )
so hieght on both please

[Rurouni Kenshin]

My tank is 18" deep, I guess I'll be cutting the hood down till the Mh is 8" above water? Or less?

[ThunderousTalon]

cut it down to 10" keep an eye on the temps etc.... you can always cut more...

[Rurouni Kenshin]

Alright, Thanks.