Length of Light fixture?

[dubba-r]

I currently have a 125 gallon (72" inch long) FOWLR, but only have the standard light fixture that came with the tank. I know that Im fine with it because I have no corals (and don't plan too have any). I just wanted the type of lighting that will bring out the color in my fishes. The two 20W 50/50 bulbs I currently have aint cutting it.
Ive been currently researching some budget pc's like the csl or the complete hoods from hellolights.com. My question is, do I need a 72" light fixture (custom sealife has a pc thats 2 x 96W) or would a 48" (helios 4 x55W) be good enough to disperse light throughout my tank?
Also, would it be safe to put such high wattage light when I currently have a 7" vol. lion? I think I have read somewhere that they were light sensitive?
Any suggestions?

 

[wamp]

You want your lights all the way across the tank. If not, you will get dim spots in the corners. PC would be the way to go in a FO. They are cheaper then VHO and Halides and those two are not necessary in a FO.
As far as bulb sellection, the new SmartLight PC is an awsome looking bulb. You could get 2 of those over the tank and it would look nice. I do belive they make a 72" retro with smartlights in them.