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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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electrical - Recessed lights still getting power when switch is off - Home Improvement Stack Exchange
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Mengshen Wireless Light Switch and Receiver Kit - No Wiring Required, Up to 100ft Range and IP54 Waterproof, Ideal for Wall Ceiling Lamp LED Bulb Lights Fixture : Amazon.co.uk: DIY & Tools
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