cheers peep's....temp no problem,light on 72 deg,light off 58 deg..sweet..i've got a 5" extraction system,run off a 8" inline bell fan an a 10" carbon filter...no nasty smells leaving my growroom!!!!!! love an respect SPLIFFBUILDER...... PS. IF YOU TURN YOUR HEAD TO THE LEFT YOU CAN THE FAN AN PIPE'S IN THE BOTTOM LEFT CORNER(PIC TAKEN SIDEWAY'S)