I think 2' is still too close for those babies. You could have picked up a T5 for not much more than 2 new MH bulbs, even a 2x2 T5 would suffice for a while on those baby girls. About 75 degrees is good for air temp but more importantly, you have to keep the light from cooking everything under it. 50% RH or close to it will do. PH for soil should run between 5.8 and 6.8 ideally. You should get a infrared thermometer to take a reading off the soil when under a light of that power because so much soil is exposed to direct light and will heat up easier from lack of shade. I've even taken readings from the surface of the plant when under the big lights, I don't like to go over 80 degrees on the foliage.