The energy study centre of the Institute of Engineering in Nepal has developed what is called the White Light Emitting Diode (WLED) system of electricity generation in collaboration with the United Nations Development Programme Rural Energy Development Programme. WLED system is said to be 662 times more efficient and effective than the traditional rural lighting methods. It is learnt that the bulb used in the WLED system has an age limit of 100,000 hours which can last for 54 years when lighted at the rate of five hours daily.