Oh Relative Humidity...I keep mine a bit higher than that in veg 60-80% and 45-60% during flowering. This really is most important in the final stages. You risk pest below 45% and mold above 80% during budding
Thats impossible....right....exaust wide open wont facilitate that numberthat is accurate, but if you can drop your rH 10-15% during the last 2 weeks of flower your resin production will EXPLODE!