for sure you look a little skimped on the weight, definitely due to you using minimal lights. still i bet you'll get a few eighths off of that and just t he fact that you're going to get her to harvest first try means you're doing something right...
above all, you need more LIGHT.
thats where your weight is going to come from. i use a 400w HPS and it does well in a closet 2x3' a get 4 oz every 2 months and i'm not growing to the full potential. if you can't afford an HPS (and you can, 120 maybe? on HTGSupply) you at least should go for some more CFLs, if not this grow then the next.
but ya man, lookin good and just work up from where you've started, it seems like you'll do fine, especially as you start to learn a bit more about what Mary J likes and what she doesnt