SoG with Fluro

Hey I've got a closet grow room about 9 ft X 4 ft. I've divided it up to there is a chamber for the mother and a cloning chamber. Now for the actual veg/flowering I have three 22 inch (4ft wide 2ft deep) chambers I'm tryin to do a Sea of Green method and just flower the plants in those three chambers. However I am using fluorescent lighting (4 tubes 40 watt Home Depot variety with 2 tubes of terrarium fluoros). So far the veggin looks all good, but I'm worrying about the flowering does anyone have any tips on flowering with fluorescents?

Thanks!

Yeah....change the spectrum to a flowering spectrum and add a good bit more fluorescents.

Would I see a better yield if I used CFLs rather than buying more tubes?