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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Please Turn Off Lights When Leaving Room Empty Sign, SKU: S2-0367
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Electric Light Switch in on and OFF Positions Stock Vector - Illustration of house, environment: 19398372
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Light off, electric switch icon. Simple outline style. Power turn off button, toggle switch of position concept for web and app. Thin line vector illustration isolated on white background. EPS 10. Stock