If you're looking to light up a light bulb without using any sort of lamp, the answer is to use a lemon. Whether you're trying an experiment for a science project or just curious, this is a great way to see science at work. Learn how to power your own light bulb with lemons.
Stick a galvanized nail into one end of a lemon. Take a penny dated earlier than 1982 and stick in the other side of the lemon. Pennies before 1982 will have the copper you need.
Repeat this procedure on as many lemons as desired. The more you have, the more power you get. Wrap a piece of copper wire around the galvanized nail and then around the penny on the next lemon. Do this with each lemon to connect them all.
Wrap copper around the wire sticking out of the flat side of an LED light bulb, and wrap the other end to the nail in one of the lemons. Wrap copper wire around the wire sticking out of the rounder side of the light bulb and then around the penny. Your light bulb should light up.