What you need for lighting depends exactly on what you are going to keep, hard corals, SPS & LPS, soft corals, or clams.
Your lighting options in general are Metal Halide, T5, Power Compacts, and LEDs. I think thats a complete list.
Metal Halide, or T5 can keep most anything. Power Compacts are more for low light requiring species, and I don't know enough about LEDs to comment.
Google some names and check out a few product reviews so at least when you've chosen your fixture, that you know what you are getting yourself into.
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