Glass surfing with black beard

[Snuits]

I’ve posted on here recently with other questions, but now all of a sudden my beardie is glass surfing all over his enclosure with a very black beard. I think he may see his reflection?? It started shortly after I got a new uvb, I don’t know if that’s it or if it’s a coincidence? I got the Arcadia pro t5 12% strip. He isn’t that close to it maybe like 17 inches the furthest and the closest he can get is 12 inches. His heat is good basking area is right above 100 and it’s about 85+ everywhere else. I tried soaking him today which he normally loves soaking, but five minutes in his beard turned black so I put him back and now he’s been glass surfing for the past hour. I’m not sure what’s wrong or if during certain times of year it’s more normal? It’s turning winter where I live, I’m slightly concerned because this is a new behavior for him. He’s also about 3 years old

They say when they get like that it could be because they wanna mate too as well not just being upset. At least what I’ve read. I can be wrong though so don’t quote me on that !