Basking Hatchlings

There are some that feel box turtles don't bask and that temps above 85°F are fatal.  The substrate temps under the basking light are 90° F.  The turtles can actually increase the shell temperature to over 100°F.  It is important to note that there is a temperature gradient. The turtles have a cool end where the temps are rarely above 70°F. They spend the day moving in and out of the basking area.

Under the basking light the shell temps
can be surprisingly high.

At the cool end