Whats the most powerful light for a 10 gal

[marcingo]

Just looking for peoples experience on what the best light for a 10 gallon tank is. Im looking for something that can support high light demanding corals. I have thought about the clamp on MH but thought that might be a little too much since I also want to keep some zoos. Therefore my next idea was HO T5's. What is everyone using on thier gallons and what have they had success keeping when it comes to high light corals. Thanks.