If you have the ability to go HID, do so. The 4ft flouros key is referring to are great for veg, but often you run into canopy penetration problems and require additional lights (especially if you get some big tall branchy bitches, I've had fluorescent fixtures lined around a room like dressing room mirrors). Exhaust and ventilation will be key, and don't forget odor control if you are in an apartment or shared housing. Exhaust fans are cheap, just make sure you have everything set up first so you dont HAVE to learn by mistakes. Hell, grow a tomato first.