I love them. They were pretty trick to get programmed. The
instructions are alittle vague. I would definitly only get 72" with
three halides . But you will not get 4 - 54watt T5's like you would
with the 48" fixture, unit You get 8 - 39watt with the 72" fixture.
But that is still ALOT of light. Mine really are overkill for a 8 foot
tank I just wanted them because my next project
will be 10 or 12 feet long. (I just turned 23 last month so I have
alot of cool ideas for tanks/ projects still on the list.:dance: )Plus I
have no dim spots which is nice too. So maybe not overkill. Its all up to you. I am very happy with
themSo when that time comes I will getdefinitely have AO build
my tank and if I need more lights, that too.
I have 2- infintiy XR4's 400watt. 4 54watt T5's and 4 ACLS units
Let me know if you have any other Questions about them.