What’s the ceramic lamp socket?

A ceramic lamp socket, also known as the Edison screw fitting, is a threaded ceramic lamp socket used to hold and connect a light bulb to a power source. Invented by Thomas Edison and marketed in 1909, these ceramic lamp socket typically have right-hand threads, which allow the light bulb to be screwed in clockwise and removed counterclockwise. To deter theft in public places, the threads are sometimes reversed to prevent installation in common floodlight fixtures.

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