Ok, the pictures help a lot.
There are a couple major husbandry issues you have that need to be addressed.
Firstly, the lights are much too close. Or at least they look too close in the pictures. The coil bulb next to the red bulb, how far away from his head is that bulb in the picture? it looks to be only 1 or 2 inches.
Secondly, you shouldn't really be using that red bulb.
I will give you a quick rundown on a proper lighting setup so you can get a better understanding of what is needed, and from there, you can do a bit more research or ask specific questions if you need to.
You really only need 2 bulbs. A bulb that produces UVB, and a heat bulb.
The heat bulb really only has to fit 2 criteria. It produces the temperatures you need, and it gives off a bright non-colored light. A normal household bulb will work for this as long as it gives you the temperatures you need.
For UVB you want a good quality tube bulb that spans 1/2 - 3/4 of the tanks length. The reptisun 10.0 tube, and the arcadia tubes are great bulbs, and what we'd recommend.
You need no additional heat at night unless you house drops below 60 degrees at night. If it does, you want a ceramic heat emitter as these produces heat but no light. Dragons need darkness at night to sleep properly.
I will wait to comment more on your setup until you can clarify the distances of the bulbs you have right now. But I have a theory as to what could have potentially caused this.
I assume the coil bulb is your
uvb bulb right? How old is it? Do you remember the type and brand it is?
We are here to help. I know this can all be a little overwhelming at times, but we all here will try our best to get your buddy back on the right track
-Brandon