DIY projects

I'm going to be ordering a T5 retrofit kit to put into the canopy I'm building for my 60"X18.5"X19" OceanView RR tank, should I get a 6 bulb 48" kit or do you think I will be able to fit a 60" kit in there? Thanks in advance for any suggestions.

Well I finally got to pick up my new tank this last weekend, bought it from Dallas North Aquariums. I've been meaning to post a couple pictures here but we had an unexpected emergency in the family over the weekend also, so it had to wait, my girlfriend's mom passed away in the Philippines so I had to get her and our son to California, then on to the Philippines as soon as I could.

Now for the tank:

It's a 60"X18.5"X19" tank, I guess about 90 gal, they ...