In a 10 gal tank an unregulated CHE will cook everything - even the low wattage ones. They get 300-400*F to the touch and will generally increase the temp below the bulb to well over 115*F, unless they are regulated.

You can even use a dimmer switch, but a thermostat would be best. I have two CHE's in my AP cage that is much larger than a 10 gal tank - the 100 watt keeps my hot side at 88 and the 50 watt keeps my cool side between 81-82, my ambient 79-81*F at all times. So a 50 watt in a 10 gal tank may keep the entire tank the same temperature, but if you get it to 80-82, then have the UTH bumping up the hot hide to 88-90 you may be fine. There would be less of a thermal gradient, but in that small of an area it may be your best bet...if I understand correctly that is how most rack systems work anyway - overall correct temp with a higher belly heat spot.

You'll want to experiment with temps and regulation BEFORE adding the snake. You're going to have issues with humidity, so keeping the tank lid covered will help. Also adding damp sphagnum moss on each side and keeping in damp. Just make sure it is in a shallow dish so your bedding does not mold.