No what i think happened is he shot at a cricket too far away and his tongue pulled back into his throat. I think he is fine now cause he used it right after he coughed it back ito place.
I have never covered he cage at night. He falls asleep even when my tv and lamp are on. Even when i turn my room light on he will wake up but go back to sleep once its off.
Dragonstrand has these solid side enclosures which are good. Similar to glass butbthe solid side gives the pet some more privacy. My Quad is in my bedroom and he is doing fine. Two thing tho, make sure your cage is as high up as possible. He should be able to look down at you at the higher parts...