In most developing countries when electricity suddenly goes off, people do not know whether the electric switch buttons are on or off, since the postions off standard buttons do not show the situation of the switch. While going to bed or going outside for a walk people want to ensure that electricity is off for desired rooms. Even the electric switches with 0/1 marks on them can not solve the problem since most people do not know the exact position of buttons for on or off.
Light it resembles the shape/icon of electricity when it is turned on and solves the problem in a logical way. Just by the position of switch buttons people can easily ensure the situation of the electric switch. It turns on and off by just slick sliding down and up.