If your tent is at 10 percent humidity your plants leaves will dry out and curl and when they curl, they will curl up from the sides. Almost same affects you get from having to much wind or air moving in a small tent. It happens all the time in my 4 by 4 tent when I flower. This damage will cause the leaf to loose its ability to photosynthesize you need at least 35 percent humidity, 45-50 is perfect.
That's really wild that you are able to keep your RH that low. Of course I live in the Pacific Northwest where humidity is always 100%. I'm always fighting hi humidity in my tents.
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