A:Answerthe plug is rated for 120 volts 15 amps,/1800 watts so it is possible to do so. I'd not to personally run 15 amps thru an extension cord, but that would be an awful lot of lamps and chargers anyway
A:AnswerThey are a easy way to turn lights on and off over the phone app or Wi-Fi. They may use some power but it is minimal for the convenience.
But they use 0.3W when off and 0.6Watts when on. Looking at the fine print.