I cant tell you how many plants it will handle, my guess is maybe two, ... but I can tell you not to worry about 'helicopters' and 'heat sensing' , etc ... dont worrry about it ... two things may get you busted : 1. telling ANYONE 2. odor ... other than that, don't sweat it ... after switching to 12/12, a sativa may take 8-12 weeks to finish, an indica will only need about 6-8 weeks, usually ... :smokin: