They grew pretty good with the cfl's I have. That was veg though , they flowered for 2 weeks and they had preflowers, long white hairs. They would have made bud no doubt. I think it worked so well because I had so many lumens in such a small area. The big leaves would have blocked out allot of light to the lower bud though. Next time I will probably trim the leaves before flower. The stalk when I cut them was about an inch thick at the bottom.