lighting is the big question. It really depends on what you want though i have a 47gal high and I have a 150 wat compact flourscent system. It actually works better than I thought for my tank but honestly there is no such thing as "cheap" lights. expect to spend at least 150.00 give or take for a good lighting set up. For cost purposes, id stick with compact flourscents, you get alot of light for your buck and they are probably the cheapest lights in comparison. low heat so you usually dont need a chiller compared to metal halide's. but if you want alot of hard corals and clams youll want the metal halide or some serious flourescent's. petco sells a 24inch pwr cmpct, 1 10,000 k and 1 acinic blue, built in fans the works for like 209.00(thats what I have) and i have mushrooms, zoanthids, acropra, a cup coral and some other hard branching coral i cant remember the name of lol and they are all doing very well, along with my 2 clowns and a mandarin, clown goby and a pesky damsel that will live forever