Now in the lighting industry has a broad development prospects of the led street lamp light source is known as the fourth generation light source. Led street lamp as a light source, the emerging has many notable characteristics, is one of the world is of great potential for development of a new generation of light source. And the led street lamp light source can be realized without mercury production, also has an important significance to environmental protection. At present, the lighting consumption accounts for about 20% of the whole power consumption, reduce lighting electricity is an important way to save energy. Led street lamp is with its solid with the superiority of attracted everybody's eyes. We are the projections for outdoor led street lamp lighting efficiency, if the traditional street lamp was replaced by the energy-saving led lights, can save $35 billion a year electricity, can reduce a year 7. 5. 5 billion tons of carbon dioxide emissions. And using semiconductor led street lamp as light source, solid-state lighting, will gradually replace traditional lighting into a variety of applications. Led lights have a more perfect automatic control: according to the needs of different periods set different brightness, more can improve the effect of energy saving. Such as 7 PM when light is 200 w, in the middle of the night 12 o 'clock people, automatically adjust the brightness of 100 w, which also can save electricity 60 w.