Interesting. Thats pretty much the problem I'm having. Lights on is fine. 77F with 55% RH (VPD around 1.19). At 30 minutes after lights out temps drop to 67 and RH jumps to 62% (VPD of .72) and fan is blasting at 10/10. Its in a small room about 7x7 with shitty insulation but I keep the door...