I personally think temp is more important than humidity generally. I can tweak my exhaust fan, and a small space heater and other small factors and got it dialed in where I run 80F lights on, 60 lights off consistantly, just takes some fiddling to figure out your setup.
I grow in an unfinished basement, and humidity runs 45-55% consistantly, little higher might be nice during lights on but again temp is my main concern. The last couple weeks of flower I like a litttle drier, and cooler at night so might run the dehumidifier a few hrs in the afternoon whch reduces humidity but raises temp. Never had a mold / bud rot probem indoors, ever at the 45-55 range.
Just my experience, just took a few days to get dialed in but very happy with things overall. Heres pic 5 minutes old, flowering for 3 weeks, they are happy.