young sulcata sleep habits

by Mike
(Miami, FL)

I bought my sulcata from a pet store six weeks ago

he/she is now 4 inches length

how much do these critters sleep?

mine lives outside and seems to have a 6 p.m. curfew (retreats to a rock den) and doesn't emerge till approx 10 a.m., plus appears to sleep a good part of the day.

Is this normal?