if you are doing fish only, you should be alright with some cheap florescent lights. If you do ANY corals or anenomes or some of the other critters with LR
and stuff, you probably just have to shuck out the dogh.
I would ask Anenomeman. I think he is using some yard lights from HD
. They are super bright and only like $35 or so. He'll have more info on those than I do.
also, check out ebay and www.hellolights.com
for some good prices on good lights.