this is debatable...
strain and veg time are crucial info??
3 to 4, 3 foot trees would be good, you would possibly need some lighting at mid level for the lower buds
much luck
I've been doing veg/flowering 2 big-4 ft and 4 small 1 1/2 ft.. with about a total of 430+ watt cfls
IMO, the problem with huge cfls is you can't position them well which is critical for cfls. If you look at the growers who get 4 oz + per plant with cfls, they are using many in the 23w to 42w size.
any suggestions? anyone?