When I set the tub to fruiting I dropped the mat temp control to 75, I had been keeping it at 80 or so during spawning. I hadn't noticed it before but the mycelia temp seems to rise and fall according to lighting conditions. Turn the lights off and the temp drops about 5 degrees to the set temp, turn them on and it rises 5 degrees to about 80. I'm considering lowering the set temp to 72, or lower, and see if it falls to that at night. I've got everything in my bedroom and at night it can drop too much for the shrooms during winter.... maybe.
Another thing for me to bring into the equation is in nature the temps naturally drop at night and more than likely contributes to the fruiting cycle.