Hi, How far away should the Reptisun 10.0 T5 HO be from my bearded dragon? Right now the furthest he can get from it is 47 cm and the closest he can get is 24 cm?
That's a pretty good range. 30-35cm is about the right distance directly over the main basking area. Offering access a bit closer is fine if they want it. It's also good to have areas away from it with little to no UVB so they can choose what they get at a given time.