they do need special lighting, not the normal strip lights that come with a normal hood.
your choices are power compact, t5, very high output florecent, or the best-metal halide.
different corals require different amounts of light, but if you are looking at coral, you are also looking at an expence that is worth making in my opinion. lighting and corals can both be expensive.
but to decide the lighting, first, what size tank do you have? and what types o corals are you looking for? how much money are you willing to spend? and finaly, what fish and inverts do you already have? some will eat corals