I am setting up a 75 gal tank. I know I want to grow lps and clams, maybe some easyer sps... but I really want to own and raise the first two.

I know I will need halide lights.

My question is would it be better to get an all ready assembled kit like:
http://www.drsfostersmith.com/produc...pc=1&N=0&Nty=1

Or should I get a retrofit kit.

I like the first one because everything is there, I mean down to the lunar lights, but it is expensive (trying to afford college, gas, and bills also). While I like the idea of the cheaper retrofits I am confused on how exactly that works. I umderstand that bascly paying for the ballast, so will I have to order another fixture to get some blue light (50/50 or actinic)?

Is there other options that I have over looked?

Would love it if someone could shed some light of this!

Thanks!