12000 lumens to flower 1 sq. Ft. Is pverkill. The flouros wont penetrate as well as an HID though.
You will have more popcorn at the bottom.
You could divide the lights, I thought you were using a hps to flower though?
Only CFL's man. Btw I've found a local site where I can buy PL-Ls. But if they will cost me way more, I will stick with cfls momentarily and see if I can supply myself.