I have 1 plug for my 2-250 watt halides. Mine is plugged in to my #4 slot on the PC4 which is an 8 amp plug. 1 & 4 outlets are 8 amps each and 2 & 3 are 3 amps each. The entire PC4 is only 15 amps total. Right now with my MH's on it is pulling 3.6 Amps.