Sometime ago I walk passed a stall selling power saving unit, it clam
that you can save up to 30% of the electricity bill when you just plug
it into your
house power point. He than demo with a amp meter & a light box(I do
not know how many FL. light they had connected inside the light
box).The amp meter drop from 8A to 4A when they plug it into the power
point, I really don't belive it,but they can show proof infront of
you.Can any person help me to explain ?