Existing in a very high luminous efficiency LED die, packaging technology breakthrough has been the development of a single component, long life, size is getting smaller and smaller, with digital control drive circuit can achieve dimming applications as traditional lamp , highlighting its great lighting applications market growth potential, coupled with the environmental requirements of countries have announced a ban on incandescent bulb ban, which is tantamount to replacing LED Street Light bulb is the best publicity, the use of energy efficient LED inefficient lighting to replace traditional lighting situation is already just around the corner. However, LED Lighting product quality and market varies greatly, poor color rendering part of the performance of low-priced products, or neglect due LED reliability, long life and performance, the impact of user confidence, for the poor optical design also makes LED lighting status If more traditional lighting sources are not comfortable. The same road with the LED Lights is the same situation, roads with street lighting facilities for users every day are exposed lighting facilities, the event CRI or brightness variation is obviously insufficient, will make users‘ doubts about the usefulness of LED public lighting . Roads or tunnels in general lighting LED lighting applications, LED street light efficiency will be defined in each lamp 85 lumens per watt or higher, terms of functional art construction, will be able to find LED light source technology made street lighting, public lighting, its energy consumption will be much lower than incandescent lamps, xenon lamps, halogen lamps, high-intensity lighting energy used by traditional light sources, although a substantial win energy consumption, but in fact as street lights use LED light source, still encounter reliability, light failure rate (life) affected. How to start to understand LED reliability define, in general, reliability refers to the unit of time, ability of the product to perform its functions under objective conditions observed failure reasons led street light is divided into several states, one is serious the breakdowns, which represents the entire system was seriously damaged the LED light source can not be used, and the other one is the emergence of LED light source parameter condition, affecting its operating effectiveness, that the performance of LED normal state of flux, if there is less than the initial system 70% below the value, the fault belongs to the parameter type, either parametric or severe symptoms, are representative of the LED light source lighting street lamps have already qualified for the task can not be repaired or replaced, and the reliability is low maintenance and refurbishment costs will increase and inadequate access to long-life LED efficiency. For Energy Star (ENERGY STAR) for outdoor LED lighting is defined as 35,000 hours life requirements, even LED light emitting element L70 / B50 can reach 50,000 hours of life, but because the light fades performance element by itself factors affecting quite a lot, like a closed shell or heat lamp poor operating environment, or even driving short-circuit leakage, are likely to make LED light emitting element into the life of the early impact of its durability. With the existing led street light with the manufacturing process, in fact, have quite a lot to improve the overall life of the lamp practice, for example in terms of the LED package, LED package can be said about the key to reliability, high power chip package with high resistance low heat and surface changes ceramic substrate package, not only can get excellent performance in heat dissipation, but also in the thermal conductivity and performance related parameters relatively stable packaging technology. In addition, the package size is gradually reduced, the driving current of 10 ~ 13W LED element package size is as small as 3mm * 3mm or less.