Depends on many thinks, what type of coral are you looking to keep, what are the dimensions of your tank, how much are you looking to spend?
I'm also needing lighting suggestions for a 140 gallon, 48" x 24" x 28.5 high". I'm looking to keep softies/sps/lps and really would like to keep total price for lighting nor more than $700. I really like my T5's but wondering about coral getting adequate lighting with a tank of this depth? I need a system that is going to fit in my canopy, not hang from the ceiling. I prefer the type on legs if possible. I'd like suggestions of brand, etc. if possible

Thanks!