KarrieRee":i5d5fp2k said:
Yes it needs to be in the middle part of the tank
+1. I have a digital hygrometer/thermometer w/probe (actually,
all of the digital hygrometers I found were also thermometers) with the probe located in the center of the back wall.
As temperature goes up, humidity goes down, and verse-vica, so it's normal for humidity to rise at night as the temperature drops.
I wouldn't worry about humidity at the basking spot; temperature is the important thing there, and may/will change as a dragon matures--babies/young require hotter basking temps than adults.
I think the humidity range you're shooting for may be unrealistically narrow (i.e. more difficult to maintain). I use a target range of 30%-40% daytime and below 55% nighttime (some sources just say 30% to 55%). I've found this very easy to maintain by including some beardie-safe plants in the enclosure (
NOT bio-active) and an occasional (once/twice per week) spritzing if necessary.