Light Emitting Diode (LED ) are emerging as the most energy-efficient source of lighting, with a LED bulb using 1/10th as much energy as a normal incandescent bulb and half as much energy as a Compact Fluorescent Lamp (CFL) to produce the same amount of light. However, the major challenge has been its high cost. The first LED lamp made in India, in 2010 was sold for Rs.1200.