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More than 150 years have passed since Thomas Edison developed the ingenious idea of a functional light bulb, which fundamentally changed how people used energy in both homes and offices.

United statesUnited kingdomGreat britainThomas edisonJohn henry holmesGranville woodsWilliamj newtonMorris goldbergElectrochemical componentHenry holmesSwitches overLight switchLight switchesLight bulb