Hi, all - I could really use some help here. I just bought a 90g AGA RR tank, and I'm trying to figure out lighting. I have read and read on here, and it's very confusing. This will be a FOWLR, with about 100 lbs of rock - no corals. I do NOT want to have any heat or algae issues. My LFS suggested one 48" Aqualight T5 fixture. I spoke to Hellolights and they suggested two of these units. Two, they say, will give me very nice color but not cause any heat issues. One, they say, will be a very dimly lit tank. Can anyone comment on these 2 differing opinions? It's not the $ as these lights are pretty inexpensive. I just only want to do this once. All comments and suggestions WELCOMED. .