HI EVERY ONE WAS TRYING CFL BUT NOW I JUST BOUGHT A FloraLux 250W HPS IT HAS 4" air-cooled fittings MY BOX IS 2x2x4 HOW MUCH ventilation DO I NEED I HAVE ONE 4" SquireL FAN 265 CFM DO I NEED MORE FANS FOR intake OR exhaust and do i need more exhaust then intake my FloraLux 250W HPS has ben...