48" TEK 4x54w or 6x54w over 75g?

[jesse!]

I am in the process of buying a new lighting system. I have chosen to get the TEK T5HO fixture but i'm not sure which one. This is going to be used over a 75g and I want to be able to keep SPS LPS clams ect..
Would the 4x54w let me keep these corals or do I have to get the 6x54w? both fixtures come with individual reflectors.
thanks

 

[nycbob]

go with 6x54w. with more bulbs, u wont hv to worry about placement of corals or inverts.

 

[pbnj]

If no halides, definitely 6x54w.