Hey Tony, welcome to the board, you picked the best one on the internet if you have a corn snake. there is alot of information here just read read read, and search, then read some more. My advice to you (being a new snake owner myself) is to go and get yourself a digital indoor/outdoor thermometer, (one that has a wire coming out of it with a thing that sticks on to the outside of the window to measure outdoor temperature) they are not that much here in the states and shouldnt be that much there, you can find them at any home improvement store/hardware store or Wal-Mart. and what you do is place that thing at the end of the wire about the middle of your warm side burry it in the substrate a little and then mount the thermometer on the viv (your snakes cage) somewhere, inside or out. (just make sure if you mount it on the outside of the viv that the wire goes through a very small hole you dont want your new friend to escape) now make sure the thermometer is measuring outdoor temperature and thats the tempurature that needs to be 80-85 degrees farenheight. If you want you can buy another thermometer of the same type to measure the cold side at the same time. mine is set up his way and I can glance at the viv at anytime to get a visual of the different temperatures, its great.