Just a thought with a dimmer switch - please take note!
When you set the dimmer to provide the right temp in the tank it is doing so ONLY at those exact environmental conditions. Should your room warm up then the temps will be too hot in the tank, if your room cools down the temps will be too cold in the tank.
Unless the outside environment is kept exactly the same then you will need to check those temps in the tank constantly in order to ensure you dont cook or chill your snake.
A thermostat will do all these constant temperature checks for you and give you more peace of mind. (Tho you should still check the temps weekly to ensure that the temps are stable
)
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May you have more good days than bad
You never know how strong you are - until being strong is your only choice
There are no dark clouds - just well hidden silver linings!!