This may help, also for the lamp you can cut an out line of the lamp out of the tin foil if needed.

Step 5
Keeping in humidity is one of the hardest things in a glass tank. I use foil on the top to help keep in a little heat and humidity. Take the foil and fold it over itself three times and keep about an inch gap on both sides. Then secure it with foil tape.

This is not my tutorial. The original post can be found here!!

http://ball-pythons.net/forums/showt...p-w-pics-*DUW*