Mine has a light in his T8 on a timer and likes to stare at it occasionally. He also likes to have his face stuck out of wherever he's hiding in the morning most of the time when it comes on so he can watch out of his cage. He hides his face again around when I leave for work. He doesn't seem stressed by it at all - he's honestly become kind of nosy and seems to want to know what's going on. (He might just be hoping for more food from me because he also seems to want to be fed more than weekly even though I used to feed more like bi-weekly...the clear waiting for food position almost every evening makes me feel a bit guilty :/ he is a fat boi at heart.)