Led street lamp selection should consider the led street light with the light. With just to light source, Or lamps and lanterns) The intensity distribution in all directions in the space, the same power led street light, often with good light illuminate is wider, the light is more uniform. In addition to considering the led street lamp light failure. Pop is led light failure after a period of light, the light intensity is lower than the original light intensity. Affect the droop mainly has two problems, one is the led chip quality is bad, the second is the led chip heat dissipation is not good. So, the led chip purchasing normal manufacturer as far as possible to slow down the light failure, and heat lamps and lanterns is have inseparable relations with the structure of lamps and lanterns. Led road lights color rendering index above 75, think in terms of visual psychology, to achieve the same brightness, outdoor led street lamp light can, on average, more than 20% lower than the high-pressure sodium lamp, light failure is small and the advantage of led lights, light failure is less than 3% a year, still meet the requirements of the road to 10 years, led lights on the design of the use of power can be lower than the high-pressure sodium lamp. Led street light automatic control and energy saving device, can realize to meet the requirements of different times lighting cases, most likely to reduce the power, saves the electricity. Can realize the computer dimming, period and control, light control, temperature control, humanized functions such as automatic inspection.