Personally, I would start with the lighting first. You deffinately need more light if you plan to get a decent yeild. Depending on what MG (6-month release/3-month realease/moisture control) soil you are using, you may not have to add any nutes until flowering begins. Growing with MG can be very tricky if you use the release soils and plan to use nutes.

I highly reccommend you study this site and all it has to offer if you are serious about growing.

Lighting:Within a few inces of the plant, not touching (CFL's do burn)
Veg-6500k (cooler/daylight)
Flower-2700k-3000k (warmer/soft)

Shoot for atleast 3000-lumens per sq. foot.

Good luck!!!