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The cost effectiveness of when to turn off lights depends on the type of lights and the price of electricity.
York University Undergraduate Residence - Day 2: Turn your lights off before leaving! Help reduce energy consumption by unplugging and turning off all of your room lights - including those festive decorative lights!
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When To Turn Off Your Lights Department Of Energy, 44% OFF
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s Alexa can now act on its own hunches to turn off lights
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