Depends on how big your plant gets and you can always use more lights especially in flower. Rose is a light addict! LOL! Me, I went from cfl only, to cfl and 250 watt HPS, to cfl, 250, and recently added a 400 hps so you got to wonder who's calling who an addict! LOL! More light, better production but on a first grow it's learning time. Side lights are also good to get the bud under the canopy to max out as best then can. HPS and MH cause heat problems so when you move in that direction you have to take that into consideration and that's why it's best to learn as you grow. I'd be looking around for some 2700k cfl's (warm white) in case you want to play with it as they go into flower. If finances are tight you can still get good bud on a first grow and lots of it.