When walking on the street, gentle neon come from LED street lights lightened on the road, guiding the way home. When seeing these street lights, it just like our parents asking us to go home, which make us feel warm and comfortable in the big city far away home. The street light gives a sense of security of walker at night. We know the street lights are very important to us, especially in the big city, if without the led light bulbs, how can we image all street is black at night. Someone will crazy if this situation occur. Thinking about it: there are so many cities and so many towns, how many street lights we need, and how much electric consume? The power using on the street light is huge. But we need to save energy in this resource lack society, how can we solve energy on the street light? There is the LED street light which can save energy effective compared with led lighting. And there are many advantages of led street light.