My LED was only 36" above the pots. Temps stay between 76 - 82 degrees. Humidity for Veg I keep around 70% & 30 - 40% during Flower. I use 4 Clip on Fans for Air Circulation & a 6" Carbon Filter for Exhaust & a 4" Carbon Filter for Intake Air. I use the 600 watt Meizhi during Veg & then turn on 7 - LED Spotlights (6-Red & 3-Blue LEDS in each light / 28 watts ea.) during Flower. I think I'm in relatively good growing conditions .... but maybe not. LMK.