Humidity is way too high when I have lights out, usually over 80%. I could have figured this out much sooner, but for some reason I did not think humidity mattered much with lights out. I had avoided the problem with mold by growing smaller less dense buds. Any good dense flower I have grown since last October started having mold issues around week 8 of flower, a few exceptions were grown, most notably was Monkey Juice which avoided the problem.
Looking for a good dehumidifier for my 420 cubic foot flower shed. Nine plants, 7 gallon fabric pots drinking about half a gallon each per day. Outside air intake is used to modify humidity during lights on, but not an option at night.