Souvenir lamp with meter, 1985
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With the light bulb switched "on," the meter on this lamp turns and illustrates the reality of the electric grid – light bulbs (and other electrical apparatus) use electric power.
These lamps are a common gift item from and for electrical engineers. The internal mechanism of the Sangamo watt-hour meter has been partially de-magnetized, so the dial turns faster than it would if the meter was mounted on the side of a house.