Hi and welcome :jointsmile:

For four plants, and that space, a 250w hps would be pretty good. I know I know, you don't want hps and are worried about the electricity of your house but it's really not that much in the end, even with a decent exhaust fan. You can use a microwave in the house, right?

CFL's will grow bud, but they are not as efficient per watt, slower, need more sockets and wires, and require constant adjusting. :twocents:

Happy growing :jointsmile: