Any gas discharge lamp has a pair of electrodes, acting as cathode and anode. Both electrodes alternate when these devices run with alternating current. And here I would like to introduce you LED light bulbs. These white LED bulbs are 100% brand new. MR16 LED light bulbs feature ultra low power consumption device, thus these white LED bulbs are also power-saving lamps. In contrast to the other kinds of lamps, these 12V LED lights can save a lot of power for you everyday. The light housing is made of high quality aluminum alloy and ABS plastic, which ensures the white LED bulbs durability, anti-shock and shatter-resistant. Moreover, there are not any harmful elements like mercury or lead existing in the MR16 LED light bulbs. There is no radiation produced when you use these white light bulbs. Environmental friendly and reliable performance makes these LED light bulbs popular! What are you waiting for? Order it now!