68w'ers run $15 at home depot. Try running 2 or 3 at least. You'll get great results and way better than a bunch of low watters. The key with the CFL's is getting the most lumen/watt pers sq.ft. The 68w'ers not only put out 68w but around 4200 lumens if I'm not mistaken. More penetration, do some pruning and even the lower buds will develop decently.