Whether you are experimenting with voltage or just want a cheap source of light in a hard-to-reach place, connecting a lightbulb to a set of batteries is one way to get the light you need. Because of the range of voltages available in batteries, household lightbulbs won't do the trick; these are generally about 120 volts, which is too much to power with batteries. Flashlight bulbs, however, can be powered simply from a set of batteries.
Instructions
1. Match the bulb size to the battery output. Use flashlight bulbs and two AA batteries, which are roughly the same voltage. If you use a bulb with either too little or too much voltage in relation to your batteries, either the bulb will not glow or the filament will burn out.
2. Attach a wire to the positive end of the first AA battery. Trail the wire to the light bulb and wrap it around the screw-like base of the bulb.
3. Attach a wire to the positive end of the second AA battery. Trail the wire to the light bulb and wrap it around the nub on the bottom of the lightbulb.
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