9/10 times people are going to tell you to use a UTH. It is better for humidity and providing a hot spot BUT you have to make sure the ambient temperatures are good (usually depends on the temp in the room) and you NEED to get a thermostat to control the temperature of the UTH, so it doesn't get too hot and harm your snake. Lamps can be okay too, but they burn up humidity really bad and just aren't loved by the snake keeping community