zxknight- that is not overkill @ all. you can even double it. for example
on a 90 most people have 2- 250w mh= 500 plus another 150 or so watts of vho, pc or t5 for actinics= 600w+
cool thanks guys i think i amd going to order my t5 and maybe put 2 pcs on as well i have a retro laying around.so hopefully my reef will like 4-39watt t5 and the 2-96 watt pc