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Electricity in your house or anywhere else comes in volts. When you screw in a light bulb, you screw it in to an electrical socket that has a certain number of volts. The socket can have 3 volts like a flash light, 12 volts like a car, 120 volts like American houses, or 240 volts like some Latin American houses. The light bulb is designed to work with one of those voltages. If you put a 240 volt bulb in a 120 volt socket, it will glow extremely dim. If you put a 120 volt light bulb in a 240 volt socket, it will glow extremely bright, but it will burn out in a short period of time. So you should put a 120 volt bulb in a 120 volt socket. In the United States, you will not have that trouble. However, if you take your yacht to a foreign country, you might put your light bulb in the wrong socket.

Another Answer

A lamp will only operate at its rated power when subject to its rated voltage. So, if you want your lamp to operate at its rated power, you must connect it to a supply which provides its rated voltage

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