Motion sensors in these settings can be linked to a larger number of lights, making the purchase of the sensor more economical. Motion sensors may be best suited for offices and retail stores, as they remove responsibility from the last employee leaving to check that every light is shut off. This may include closets, bathrooms, entrances, utility closets, garages or guest rooms. Installing a motion sensor is probably best in a medium or low-traffic area, where you’re prone to accidentally leave a light on and not notice. In these cases, be sure to install a CFL bulb, so even if the lights are left on for a long time, their energy output is minimal. It’s very unlikely you’re leaving your lights on that often, especially in places with high traffic, such as a living room or kitchen. So unless you’re forgetting to turn off your 60-watt light bulb 14 hours a day every day for a year, the cost of purchasing and powering the standby light switch isn’t worth the investment. ![]() ![]() In order to respond to movement, these light switches are always on standby and thus consume some amount of phantom energy. If the light switch lasts 15 years, it costs you about $.10/month. ![]() The first search result for “motion sensor light switch” on costs $19.09 before shipping.
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