I have a couple of baby bearded dragons that are still pretty small, about 6" long. They love getting out and exploring a bit. Normally after about 20 minutes they will run back to their cage to get back in. They will start glass surfing on the outside of the enclosure and I'll put them back. There is a window right next to my bed that they can get to. I opened it one time and they climbed up on the window screen and seemed to love it. It was about 95 degrees out and the sun shines right through the window in the afternoon. It seems like they would sit there for hours on.the screen if I let them. I am worried though about keeping them out of their cage for too long. They are getting a decent amount of heat but I was thinking that the window screen could block the UVB from getting to them. Is this true? Also, how long do you think it would be ok to let them hang out on the window screen. I only plan on doing it while it is hot during the summer.