Most
lamps do use a tiny amount of
electricity when plugged in and turned
off. ...
Lamps use very little because they have no computer parts or batteries. The switches need to remain charged to be turned on the next time you want to turn the lights on, and that is where the small amount of standby drain comes from.
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Touch lamps work on the principle of capacitance \u2013 the amount of charge something can soak up. In circuits, components called capacitors store varying amounts of charge and are used to tune circuits like radio receivers or smooth out fluctuations in voltage. ... The lamp detects this and switches on or off accordingly.
