Over this past winter and early spring I did my first grow in a large sunroom, with supplemental 6500k CFL lighting overnight. The only real error I made, IMO, was to veg for only two weeks. You can read about it in the link in my sig.

The grow I'm doing now is taking advantage of the longer days, and once again is a bucket grow, but the plants are outside in full sun all day, then moved into the sunroom at night to keep them warmer than they'd be outside.