I believe you will be adding more bulbs later?
I'd suggest 2 URI AquaSun and one URI SuperActinic. If you have the IceCap Ballast the AquaSuns will last about 2 years and the Actinic about 1 year. WRITE DOWN THE DATES!
well ill be adding 1 more bulb later, cant the 660 only handle 4 bulbs. I know it can handle 4 48" in bulbs, but for some reason i was thinking it could handle 4 bulbs max. Is this right or just something stuck in my head??
The 660 can handle a maximum of 4 bulbs not more than 16 feet in total combined length.
I also agree with going with URI bulbs, white and blue combo. With three bulbs, I would use two whites.