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Electric Light Switch in on and OFF Positions Stock Vector - Illustration of house, environment: 19398372
Why would light switch manufacturers write the words on and off on their switches? Is it not obvious if the light is on or off? - Quora
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Acegoo Wireless Lights Switch Kit, No Wiring No Battery, Quick Create or Relocate On/Off Switches for Light LampAppliances, Self-Powered Remote Control Switch for House Lighting (Switch and Receiver) : Amazon.co.uk: DIY &
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