Close call last night. Before going to bed, I checked on the girls one last time. Good thing. The MH light was still on. The timer should have switched it off 2 hours earlier. Turns out I hadn't set the switch properly. It was in the "On" position instead of "Timer". An extra 2 hours of light wouldn't have been a problem, except the exhaust fan is on a different timer, set properly. It had turned off 2 hours earlier. This, combined with all the new insulation, walls, floor, and door, and the hotter running MH light and the temperature was an even 100F. Oops! I checked the small 4" pots and they were almost dry. Fortunately the girls looked fine. I switched the light off and gave them a cool drink of water and set the timer to "Timer". Disaster averted.
This AM the temp was still 92, so I removed the insulated floor covering and cracked the door. I also set the exhaust fan to run 50% of the time instead of only 25%. Temps have stabilized at 77. Perfect!
Last grow during veg, outside high temps were averaging in the teens to 20s. Now it's in the 60s. Today was 73F. Oh well, only a few more weeks and I can switch over to the cooler running HPS for flowering.