In the past several years, the conventional light bulb has started to become phased out and replaced by light emitting diodes. Led Lighting has become really popular because they use very little electricity and burn just as brightly as the regular incandescent bulbs. The difference between LEDs and the regular bulb is that while the regular bulbs allow flow of electricity in two directions, the special LED diode has a p-n junction and allows electricity to only flow in one direction. This makes the bulbs durable and very effective. Here are a few things that you need to know about how LEDs function.