Why is my jackson sleeping?

i turn the lights on at about 7am he basks most of the day then he walks around a little then at about 8 pm he goes to sleep with the lights still on I don't know why he does that. He stays a light green with some yellow the whole time so he's not stressed. He eats and drinks well so I don't know the problem.
Should I add light to the whole cage so there is lightly the bottom? The bottom of the cage it's kind of dark so maybe when he goes down there he thinks its bed time?
Thanks in advance
Okay thanks for the fast responses I was just getting a little worried

And I just realized I put this thread in the wrong place, sorry.
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