How much should a yearling Sulcata be sleeping?

[bsstovel]

I have a yearling who is generally up around 7a or 8a, but as soon as 4p comes around they'll march over to their hide or pick a corner under one of the CHE lamps and is lights out until the AM again. While awake the little buddy is very active wandering around and eating lots. Is this a normal sleeping pattern? I'm not sure if 8 hours active is too little, too much, or about average. Perhaps its just instinct from sensing the winter weather and shorter days?

Thanks!