IMO and as someone who constantly battles with extremely low RH I would say that you have nothing at all to worry about in this range. Personally, I’d be more concerned with your temps going north of 30 rather than RH at any reading. Humidity is concerning for Mold yes, but that only works in conjunction with those hot, sticky temps. Given my growing environment, I can reliably say that you’d be surprised just how wide the tolerable ranges for cannabis are. You’re hovering around the wheelhouse homie👍. I bet you could swing your RH lower by just draining your runoff and letting er dry out a little longer (if you were really concerned about it). Keep up the good work and will def. be reading up on this one. She’s a freakn beaut😎!