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Review title: Very convenient, and saves energy too
Product review: Have several of these at home. Very convenient when you wish to cut off power to an appliance without unplugging it (safety reasons, etc.). I find them very useful to control power to devices with AC/DC adapters (e.g. halogen lamps, etc.). If the adapter feels warm when not in use, the adapter is burning significant amounts of electricity. Flipping the outlet switch is easier than unplugging the device and accomplishes the purpose. I installed one at my parents where there is a spotlight mounted on top of a bookcase. The lamp has an on-off switch but is too high to reach. Adding a rotary switch on the cord might cause an accident if the person pulls the cord too hard and pulls down the lamp. By plugging the lamp into a switched outlet, it can be turned on/off safely without disturbing the cord or possibly pulling the lamp from its perch.
