The Megaray bulbs are mercury vapor and emit uvb.
https://www.amazon.com/Mega-Ray-Mercury-Vapor-Bulb-Smallest/dp/B00VF9AWH6/ref=mp_s_a_1_5?dchild=1&keywords=megaray+mercury+vapor+bulb&qid=1601669303&sprefix=megaray+&sr=8-5
Yes Dank is currently living full time in the free range. There is a Megaray bulb and two led bulbs hidden behind the veil of fake plants at the top. All my chams spend time outside during spring and summer so they get a lot of natural uvb also.
I currently have 50 babies and it’s not uncommon to see one basking with his eyes closed. That said, it shouldn’t be all the time. Maybe you uvb is to strong?