Thermometers and Heating Element questions

[guidofatherof5]

You probably don't need both under and over heating. I use all under heating for my enclosure. Flex watt on a rheostat.
This is just what works for me.
Snakes seem content.

[Sonya610]

You probably don't need both under and over heating. I use all under heating for my enclosure. Flex watt on a rheostat.
This is just what works for me.
Snakes seem content.

For these garters I will probably use only overhead during the summer months, and both during the cold winter months (unless they need cooler temps for health/psychological reasons, i won't be breeding).

I am sure they do just fine with just undertank, but with the temps here being 75-85 for the next 6 months I can probably just use overhead.
Since I can easily do it either way might as well mimic nature so they can get cooler in their dark little hidey holes and bask in "the sun" when they want more heat.

Just wondering if those temp probe thermometers are good for measuring basking temps.