You will need gloves and protective eye wear for this. Break the seal and using pliers, take out the tube and empty out the contents. Click here for more detail. Find a metal washer that is big enough for a 12 cm cotton string to go through but also hold it in place. Glue the washer to the the part that you use to screw in the bulb. Find a round base to place the bulb on. This could be a washer, a large nut, a plastic bottle top or even a piece of wood with a circular hole carved into it. Glue the glass part of the bulb to the base so it is secure. Fill the bulb with lamp oil and thread the string through the washer at the top. Congratulations! You have now converted an old light bulb into an oil lamp. For video tutorials, click here or here.