Need advice for lighting 24" x 24" x 22" cube

[xenon]

I am surprised nobody is asking what types of corals the OP is planning to keep.

Once the coral type is determined, we can then begin to recommend some lightning options.

Most of the LED's will work no matter what type of coral is being kept because the lighting intensity can be dialled back.

With that said, if he plans to keep SPS, I would shy away from LED's if maximum coloration is the goal. I don't know why but LED's are just not there yet if you want world class coloration. MH or T5 is usually a better choice.