as far as I know, 2ft standard tubes (what you linked to) are 17-20 watts each, so the entire fixture would create 34-40 watts. This is about 2000 lumens total for 2 20w t-8s. You might be able to veg a few plants like that, but when you try to flower you won't have nearly enough light -- not even close. You would be way better off with some cfl's, just the little ones that screw into a standard light socket. The 27 watt ones produce about 1800 lumens each, and cost about 2.50 each. Those old t-8 fluorescents are total crap for growing. Just being honest, sorry but you'll need a lot more light to grow anything more than a few leaves.