yea, I said T5's were the best as far as flouros, followed by T8's and T 12's. T12's are the weakest, hence, on the weaker side. I use a 4 Foot T5, 8 bulb for vegging and planning on using it to flower, 40,000 lumens. 2 T12 bulbs @ 4 foot equals about 6000 lumens. Which is why I also stated...