I agree! The temp of my room versus the temp of my tank is usually a constant battle.
This is why a tstat is the best option. It is the most important piece of equipment you can buy. I dimmer will work but is not ideal and can really do harm to your animal when you have a climate change outside of the cage.
KMG
0.1 BP 1.1 Blood Python 1.0 Brazilian Rainbow Boa 1.0 Aru Green Tree Python
0.1 Emerald Tree Boa 0.1 Dumeril Boa 0.1 Carpet Python 0.1 Central American Boa
0.1 Brooks Kingsnake 0.1 Speckled Kingsnake 1.0 Western Hognose
0.1 Blonde Madagascar Hognose 1.0 Columbian Boa