ayun sa question ni TS a "device that can lessen consumption"
meron daw watt strippers, pero wag kang maniwala doon, those things do not contribute to a lesser energy consumption, just like what ate gwenda have said, the only thing you could do is to avoid plugging appliances when not in use, as these contribute to vampire loads.
a device that lessen consumption would either; destroy your appliance, do nothing, can contribute to a greater consumption
my opinions