I got a 600W hps,a 8000 btu ac unit,3 fans pushing 1800 cfm,3 timers & a mini dehumidifier =$80.00 more a month.
OH-TAY?
edit; I forgot to add, that's on 12/12,my grow space is only 53"X53"X72" made out of 2X4 construction just like a house is built & very well insulated.I also have my ballast outside the room & my light hood is sealed.A 550 cfm fan blows outside air thru the hood & exhausts it outside my gro-space.