well, you look for(meaning sex) spike like white hairs coming from each node, then you have a female, the other is quite obvious, little balls is a male. and if you want, after you establish sex and when you feel that it is ready to harvest, about 2 weeks before, you can zap'em with UV at like ten min. intervals 2 to 3 times a day to increase the trichome production, considering the genetics. but be kinda far away from your plant or you will burn them, the light thing, now you do know they veg very well in the blue spectrum, so you get cfl's with the blue spec, and the wattage you are using is pretty good for what you are doing, so if you have any other questions just ask.