Humidity help

Need to pick some brains,
Im in flowering with two plants ak49auto 5 weeks in + pineapple chunk 3 weeks in
Day humidty is around 35-50
Night slightly higher 48-60 rh its lower when it not raining out side. It's a soil grow can I keep the humidity down at night by turning off my in take fan and just leave the fan in the grow room running Just don't want to end up getting mold. Any in put would be great

Seems fine obv different variables for different grows but if I don't have my dehu on my nighttime rh can get up there with no problems but I try to keep my rh AS LOW AS possible in flowering, it's just what I was tought, and it what's works for me but I'm sure someone will say I'm wrong but o well...I was told when it's flowering and the humidty is low as possible (dry as possible) it creates more trichomes because it tricks the plant into thinking it's drying out, so brings more out to "protect" its water supply when in reality it's not drying...

Like I said it works for me, I do believe this, but I don't know it could be entirely wrong...but I'll still do it regardless

Thanks for the in put mate il see what the humidty is when lights come on it's only really when it rains it can be a bloody nightmare. Just thought turning of the intake will slow down the cooler air from raising the humidty a little.