Thanks Mark obviously I didnt look good enough, I have that info already.

Its make is seems like 4 bulbs is the max that it will drive. T5s only come in 24-48" if im not mistaken. Wonder what the best way to do this is.

How many bulbs and at what lenght?

My tank is 6ft long b 2ft wide. any thoughts on that. Will I have to buy another ballast or with the one 660 be enough..