I don't like anything but HID lighting for flowering. Anything works fine for veg, but you need some good light for flowering or you won't get nearly the weed you could. Other than that, I would most certainly use flourescent lighting, probably the 24 watt ones that equall 100 watts of incandescant. There are a lot of advantages to flourescent, like low energy bill, and you can get the plants right next to the lights, and you won't need a whole lot of ventilation, like with HID.