Whenever we have to use washroom especially in night we have to on the light when we enter and we have to off the light when we leave. And sometimes we forget to off the light as we are in the middle of the sleep or because of any other reason. This lead to wastage of energy and money. Hence to resolve this problem you can assemble this easy circuit.This circuit can easily be installed in railway stations, restaurants and malls because in such places no body care about electricity wastage and there is no body to off the lights. This leads to wastage of resources.