If you can get the 42watt cfls go for them, i'd say get around 5, giving you over 200 watts (for 4 feet sq i reckon thats right, but the more the better within reason) or if you can get envirolites (they're just a big cfl) i'd recommend getting one of those, they do a 125 and 200 watt lamp. Remember to the daylight or cool white and not warm white for vegging.