Starting to Worry

[Popumosh]

Hey guys, I have a 1 year old spur thighed named Phillip, hes been in my care for about 4 months now, he lives in a large tortoise table with an appropriate lamp that keeps him at about 32 degrees, he has been fine for ages but more recently I've started to notice him going to bed much earlier, his light is set to go off at 8 giving him 8 hours of lamp time but he tends to go to his sleeping section around 5 or 6, I also noticed he doesn't eat quite as much as he used to... Now i'm just wondering if he is ok or if something needs to change, any suggestions are appreciated.