Led street lamp light bead chip is can directly reflect the screen brightness constitute parts of actual effect. If the led lamp bead chip product quality is not very good, not only will cause the screen brightness actual effect is not very good, will interfere with the reliability of the led street light the screen brightness. So the street lamp factory should choose brand manufacturers of led lamp bead chip, because of the brand manufacturers pay attention to word of mouth, attaches great importance to the service, production technology is relatively mature, so on the product quality and quality must be ensure. Due to the led chip calorific value is bigger, so led street lamp head inside must supplement the radiator to use. Outdoor led street lamp radiator is an important factor to interfere with the screen brightness reliability. The same also select brand makers production radiator, we have to admit that their radiator cooling efficiency is higher, the same time radiate heat more, thus the reliability of the street light the screen brightness is higher. The user as long as more attention to when buy led street lamp of light bead chip, the lights will not have to worry about the brightness of screen will not stable, the condition of light of the actual effect is poor.