I thought you might ask that, and I'm afraid that I can't answer very well. I told the guy at the store that I wanted to grow corals, and he told me, "You should get this setup, which comes in this box right here, and is intended to be used for corals." It has two actinic blue bulbs and two full spectrum bulbs, arranged alternately, plus a pair of LED
lights, which can be used to simulate moonlight when the other bulbe are off. Right now, it seems to be doing a bang-up job supplying the needs of numerous mushrooms and frogspawns and zoanthids and some other bright green things, whose names I can't recall right now - plus the brain coral mentioned above.
They're a step up from regular lighting, and not as fancy as Metal Halides, but I don't remember exactly what they're called.