You can prolly start with a fluorescent untill it gets bigger. Then buy yourself a hps in a couple weeks. I think you can get 9 plants in a 3' by 3' plot with that light. Prolly wouldn't hurt to use the fluorescent, if you get one, with it. I think there is a company that makes special fluorescents specifically for growing (PURple, or something like that). There are some nice videos if you look around for a P2P program. Buy, "The Cannabis Grow Bible" if you can. I'm sure it wouldn't hurt to research hortculture a bit either.