Bo tells the good cause Tier 1 LED, do not use bipolar power devices Doug Bailey pointed out that due to the bipolar power devices cheaper than the MOSFET, usually about 2 cents a, so some designers led the drive to reduce costs Use bipolar power devices, it will seriously affect the reliability of the circuit, because as LED drive up circuit board temperature, effective operating range of the bipolar device will rapidly shrink. 2, do not use voltage of 600V MOSFET breakdown voltage of 600V MOSFET cheaper, many believe led lamp input voltage is generally 220V, 600V so the pressure is sufficient, but many times the circuit voltage to 340V, there is a surge in the time , 600V MOSFET can easily be breakdown of Zhengzhou LED lights turn to home purchase, thus affecting the LED lamp life, in fact, the choice of 600V MOSFET may be some cost savings, but it is the price paid for the entire board, so "Do not use 600V breakdown voltage MOSFET, the best selection of voltage over 700V MOSFET. "he stressed. 3, try not to use electrolytic capacitors LED driver circuit in the end not to use electrolytic capacitors? There are supporters and opponents, supporters believe that if you can control the temperature of the circuit board Zhengzhou what good quality LED lights, to extend the life of electrolytic capacitors in order to reach a goal, such as the choice of 105 degree life of 8000 hours of high temperature electrolytic capacitors, according to traffic electrolytic capacitor life estimation formula "the temperature is 10 degrees lower Zhengzhou LED lights, life expectancy doubled," then it at 95 degrees ambient operating life of 16,000 hours, at 85 degrees ambient operating life of 32,000 hours of Zhengzhou where the production of LED Good lights at 75 degrees ambient operating life of 64,000 hours, less if the actual temperature, then life will be longer! Bo cause for some of the skills and job requirements of street light pole staff in all aspects of the market process has not yet been introduced to in this article, we will introduce some of the work of street light pole spray staff. A spray determine whether the skills of qualified personnel can not see the light from the surface smoothness and aesthetics of street light pole, but depends on street poles of spray thickness control practices as well as aspects. Spray personnel spray, the heat transfer mode is coating → street light pole; cooling, heat transfer mode is street light pole → coating. In good spray street light pole, we have seen have done this after a natural crack the case. This is because the street light pole surface coating heat slowly, spray coating and thermal expansion magnitude of differences between the workpiece, stress is large, the binding force will be reduced embrittlement. For controlled cooling stress is derived from the control of coating thickness. For spray street light pole in terms of personnel, we need to experience the amount of control is dusting and spraying distance, because you want to be sprayed according to process requirements and the shape of the workpiece may be, too easy to accumulate. And it is sprayed from the spray street poles specifications are related. These two processes are spray staff and work experience are related. Which Zhengzhou good quality LED lights, the great cause of LED lights provided by the Henan Zhengzhou cause Bo Lighting Equipment Limited. Henan cause Bo Lighting Equipment Co., Ltd. (www.zzdybcdj.com) is Zhengzhou City View light fixtures leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In the cause of the leadership with the staff warmly welcome all inquiries negotiations to create the great cause of a better future.