hey Reefer, I have a pc grow at the moment and use 4 x 23w cfl daylight lamps at 1200 lumens each for veg`ing and 4 x 23w warm lamps at 1400 lumens each for flowering, u may not be able to fit higher wattage in to your pc box but I have found that the lamps I use work just fine. there are several ppl on here doing pc grows at the moment and you may want to take a look, mewk69, Orgonzo. Md03gli and N0tmycupoftea, all of them have amazing results from just a small space. And then there are the cab growers, which are to many to list, but also getting amazing results.........hope this helps.........good luck and happy growing