Its the UVB --- please change it out to one of these --- most on the forum recommends this type--
Which
UVB light should I use?
The best
UVB light is a ReptiSun 10.0 fluorescent
tube HO (Or Arcardia 12% in the UK). Compact or coil bulbs do not emit the proper amount of
UVB light for a bearded dragon, and should not be used. Other brands, such as the Zilla Desert Series and ReptiGlo have been known to cause eye problems and other health issues with bearded dragons, and should be avoided. The reason that some UVB lights (Zilla, ReptiGlo, coils/compacts, ect.) are considered dangerous is because the wavelength of UVB that they emit is shorter and more intense than the wavelength of the "safe" lights (ReptiSun, Arcadia).
UVB lights should be replaced every 6 months. The T5’s are a strong bulb and only need to be replaced once a year – the T 8 every 6 months--- where as the T 8 are not as strong—they need to be placed inside the tank the T 5 10.0 bulb approx 10-11 inches from basking spot – the T 8 approx 8-10 inches from basking spot—the cover needs to be off the bulb for full effect of the UVB rays-- this will change his behavior --- he needs to be basking at least 4 hrs under his lights-- I wish petstore people were more up to date on what they sell and what is good and what is bad!! I would get that UVB changed out ASAP --- what size tank do you have your little guy in?
Karrie