Thanks for the input. The corals I have in there right now are just some mushrooms and some star polyps and they seem to do well under any lighting. In the future I am planning on getting a couple of more interesting corals such as some LPS. My aquarium is just a standard 55 gallon. Am I alright going for the 54x4 watt nova extreme fixture or should I get the 6x54 nova extreme pro. Right now I am just talking aesthetically.