t5's

I'm thinking about going with t5 lights instead of halides. I'm going to buy 2- 36" fixtures but I don't know much about the wattage. Does anyone know about how much I'll need for a softie tank? Or any feed back would be helpful.
 
depends on what you want to grow sps,lps or softies...

On one of my tanks i have a t5 fixture with 8x54 bulbs...I had this on my 150 gallon tank with sps, lps and softies. I know have MH with my t5 on a different tank. I can tell a big difference with my sps are growth and polyps extending alot more..

I now have my old t5 fixture on my 135 with just lps and softies. And are doing good.
 
i'm going to be keeping softies thats all. I'm just wondering if 4x39w will be enough? (on both sides of the tank)
 
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