What about your exhaust system? Try to do something with that RH instead of messing with the light schedule (better exhaust out of loft should help). I would let the temp go higher when the lights are off with good air circulation. Turn them off during the day, when RH is not such low as in the night, add some heating fan to your loft to make ambient air dry and warm around 26 degrees and this air run through your grow space. Or get some dehumidifer but I do not know what your possibilities are...? You want flowers full of trichromes, high RH inhibits this the most. Also running lights on 24hrs will not encourage trichs production, you need some dark for “recovery” and “preparation“ for another light assault even with autos. Are you feeding them still???