The wattage simply applies to the size, so a larger mat will be a larger wattage. As above just go by the size needed to provide 1/3 to 1/2 the size of the snake's home. If the snake is in a faun or a rub which is on top of the mat then it doesn't matter if the mat is a little too large as it's OK to leave the extra sticking out ;)
Ah yeah might do definately going for a rub now so yeah I might get a bigger one and I've read also that puttingit on polystyrene helps insulate not sure for a rub though this was on a vivarium would I need it on a rub or not?
I put a sheet of polystyrene under the mat to reflect the heat back up. You do need a small air gap between the faun/rub bottom and the mat of a few mm though. Have a look here, excellent thread on setting up :) http://www.thecornsnake.co.uk/forum/topic.asp?TOPIC_ID=9878
I put a sheet of polystyrene under the mat to reflect the heat back up. You do need a small air gap between the faun/rub bottom and the mat of a few mm though. Have a look here, excellent thread on setting up :) http://www.thecornsnake.co.uk/forum/topic.asp?TOPIC_ID=9878