Also a big help is situations like this, Ventilation... it helps... have cool-warm air being pushed into ur area, and hot air (from mh/hps bulbs) vented into a big open space or outdoors... but if you have too much humidity try just getting fresh dry warm air being pushed in, if you have not enough humidity this is easy... get a wet shirt, towel, cloth... etc. and put it in the area in a tub.. (icecream pale, yada yada you get it) so there is no water mess. and you can try to control ur grow area...
think of it this way... YOU ARE GOD OF YOU'RE PLANTS, what does god do for us? he gave us food, water, etc.. so care for them as if they are your children.