I said 'surface temperatures as high as 150 degrees f'. Keep in mind these are the temperatures of the surface of the basking spot. Just didn't want anyone to think I was cooking them. It's winter right now, and the temps are a bit lower. The highest surface temperatures I could find as of right this moment in all the enclosures were as follows:

Baby russian: 100f (I tend to keep his a little lower since his body mass is so much smaller).

4.5" russian: 125f

two large females: 130f In the summer I once got temperatures of 183f off of the dirt under their basking light. This was 4 hours before the big female laid her eggs. She built her nest directly under the basking light.