Ya SCrap that Foil, its only gonna cause Stress later on, alll your plants will eventully get fat brown/yellow spots , i use Somthing Close to foil, but its that Car heat reflector thing for your car windshield, i picked it up for like $5 at a dollar store haha. OR if u wanted.... Tape a Shit load of Shiney *****WHITE***** Printer paper on the sides of your Tout. white is a GREAT reflector