Your daytime and night time humidity levels are fine with those heat bulbs. Don't worry too much about high humidity with these guys that's where people end up having problems with them. Too much can be more harm than good. They always visit the water dish at night to rehydrate anyway so don't worry about them drying out during the day. I had a sick red eye once that was being treated with baytril and was in a dry tank. The baytril dries the **** out of their skin it literally looked old and wrinkley but after it soaked in its dish at night it was completely reversed. Just check that no frogs are sleeping up at the top of the tank directly under the bulbs as 40 W could possibly burn them if they're are exposed to it all day, easy thing to do is just bring the light canopy forward away from the area where they are sleeping.