Ideally you'd want the hot end around 28-29, and def not over 30. As for the cold end I like to keep mine around 21-24, and try to prevent it getting above 25 for any length of time.
yeah i did realise that today so i have jst ordred one now seen as i want to buy my snake on saturday, so hopfully it comes within 2 days so it can be properly set up in time for my snakey