The thing about regular dome clip on lamps is that the bulbs may get too hot. You can yous them, but IMO, they are more of a fire hazard. If you can, get the ceramic based lamps. Even the ceramic ones are a fire hazard.
Those types of heating is less preferred, because it tends to be more drying, & as mentioned, corns don't need to bask. If it is the only thing you have, you can use it, just make sure you have a thermostat, because those can get too hot as well.
The thermostat probe goes under the substrate, on top of the glass (or plastic, if you are using a bin). Basically at the heat source.
Snakes will often burrow under the substrate, & if you're only measuring above the substrate, they could end up burning themselves.