Whoo, wait a min there baby. Moma uses CFL's for side lighting. Specifically the GE REVEAL 20 watters. CFL's put out a little more uv than other fluorescents. 20watts puts out 1200 lumens, & the REVEALS are very warm at 2500K. Mixing the two make the plants happy! Sometimes I run a 4', 2 tube shoplight up the middle between 2 rows of plants; laying on its back as underlighting, but that takes a lot of space. Now I'll only be using cfl's as supplement. At 2500K, I think reveal cfls help beef up the smaller lower buds more than straight tube flourescent underlighting. A lot of lumens in a sm packagefrom these little guys.