this is my room right now, lights off. Lights on temps are 25-27 / rh 50ish

Start of week 5 flower.
Actual screen shot now.

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If you have an app that gives you a live VDP shoot for the lowest and closest min-max for an hour. You can see here I have a .03 wave which is very stable. Unless I open the tent it is normally under .07 at all times. This increases transperation and gets them leaves standing tall.
Mid flower I run at under 50% RH.
Nighttime usually winds up at 46% RH ensure you boost your fan during day to night transition, the humidity will peak as the tent holds heat and the air cools quicker.
This is also the reason to not have a bud sitting on the tent wall. Very possible to get the bud wet on a wall during this transition

Ps during this grow I lost some plants
I have 2 just entering flower and would normally be at 55% but with larger buds it 8 points lower. They are also doing fine
Also. University and commercial testing has proven when tricomes start stacking you want to be 75 degrees to preserve THC and temps. The testing showed dramatic numbers from 83 to 75 was 20% reduction in some strains.