12 Volt Man;4575887; said:no problem. just be aware that the watts per gallon rule goes out the window with T5 HO's. I only have 78w over a 65g (36x18) which on paper isn't much, but because the light output of the HO T5's is so high its crazy bright.
what you can do is if you do decide to go T5HO and find it is too bright/you get too much algae, one option is to suspend the fixtures higher above your tank. when I was researching T5 HO's for my planted tank this is one option that was recommended to me.
good luck

