You are stuck in the middle of nowhere and can't see a thing. Luckily you have pencil and your car battery. You can create 20 minutes of bright light using the graphite from a regular pencil, wired to the positive and negative of your car battery. Basically, the graphite serves as a bright filament for your emergency light. Follow along with this how-to video tutorial to learn the step by step process of turning a pencil into an emergency light.