Im planning to set up a standard 75 gallon tank and I cant decide on lights. I wanted to go with T5s but not sure which to get. I was thinking about getting the ATI 4x54w fixture or the current usa 4x54w. Would 4 bulbs be enough or would I need 6 for a mixed reef, sps/lps/softies. Or should I go LEDs.... Cant decide.