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House prices are rising wildly. For those of us, we can't buy a house. If you can't buy a house, you can buy a car first. Who knows that the "rocking number" is like buying a lottery ticket. The chance of pumping is almost paralyzed. Recently, LED Xiaobian often hears friends around me about buying a house and buying a car. Xiaobian can't help but think that in the past two years, LED smart street lights have gradually become active in the public, and have been promoted and used, charging is no longer a stumbling block. So why not consider buying an electric car, at least not waiting in line. At the 2016 Frankfurt exhibition in Germany, Shanghai Sansi and German BMW jointly launched the LED Smart Street Light Application System, which attracted widespread attention in the industry. Street lamp + charging pile directly solves the problem of electric vehicle charging. In addition, LED street lights + WIFI, street lights + display, street lights + optical communication lights and other functions, have opened up a new path for the development of LED smart street lights. Wang Yinghua, deputy general manager of Shanghai Sansi, said that the LED streetlight application system was independently developed by Sansi. It has been put into use in Jiangxi Wuning Industrial Zone and Jiangsu Hongze. The future development of LED smart streetlights is very good. At present, smart cities are advancing rapidly, and the Internet of Things is on the rise. Outdoor lighting has jumped into the market as a [new show". According to the research data of the High-tech Research Institute LED Research Institute (GGII), as of 2015, the penetration rate of China's LED street lamp market is less than 30%. The market space is huge. Xu Min, deputy general manager of Guangyu Lighting, said, [LED street lights are not only to seek functionality, but also to pay attention to appearance." With the rise of smart city construction, the LED road lighting market has considerable prospects. As the LED industry, to meet the market demand, the development of the corresponding products is the development purpose of LED companies. So, is the current LED smart street light really landing, to meet the needs of users? Huapu Yongming general manager Chen Kai said that Huapu Yongming always insists on doing R&D and service for customers, and customers put forward reasonable demands. As long as the technology can be realized, they will invest in human resources for research and development. "Since last year, Maple Yongming has been continuously developing LED smart street lamps for customers. At present, products have been used." Chen Kai told Gaogong LED. Many LED industry insiders believe that the prospect of LED smart street lights is clear, but it is still in the concept stage, and it still needs a process to really land. At the beginning of March, Dr. Hua Guichao, Chairman of Infineon Electronics, also said that he will continue to increase investment in research and development of intelligent LED driver power in the development trend of intelligent LED driver power and new product launch held by Infineon, an outdoor power supplier. Leading the development of the entire industry. [LED smart street lamps are a trend in urban applications. With the cost reduction and technology improvement, LED smart street lamps promote the rapid development of urban intelligent lighting in the construction of smart cities and become the focus of smart cities." Zhang Huajian, deputy general manager of Infineon Outside the town, the realization of LED lighting replacement is the primary task, and the development of LED intelligent outdoor lighting will be relatively slow. Faced with a huge market cake in a smart city, IT giants such as Huawei and ZTE have also participated in it and released related smart streetlight solutions.

Recently, the first batch of 10 "smart street lights" in Jinhua, Zhejiang, was unveiled in the downtown area of Xishi Street. The smart street lamp integrates smart energy-saving lighting, information network, cloud management, etc., and reserves 5G interfaces, which can realize street lamp smart lighting, video monitoring, environmental monitoring, USB charging, wireless network, LED display, light box advertising, and well water level transmission. Sense alarm and other functions. It can effectively reduce the use of various rods on urban roads, making the city smarter and more beautiful.

With the rise of the concept of "smart street lights", a "lights war" involving programmers, operators and cloud computing service providers is starting. Will eventually generate more markets, develop more cool features, and perhaps one hot topic after another in the near future. However, it is undeniable that we still need to know a lot about street lamps. As Xiaobian introduced to you in the previous article, at the end of last year, Xiong'an New District installed a number of new street lamps. Responding to the entire smart city theme of Xiong'an, this "smart light pole" has more than just lighting, as well as cameras, sensors, screens and charging posts. It can be said that it is very cool. However, this is not the whole story of the street lamp deformation. It can only be said that it is part of the function of a large number of intelligent street lamp poles. In fact, the concept of smart street lights has been around for a long time. In the 1970s, the technology of self-adjustment and active control of street lamps has emerged, which can be regarded as the beginning of intelligent street lamps. After 2016, technology began to push the street lights more urgently. The root cause of this situation is that the street lamp pole is a very special space and energy relationship in a city with a lot of space: the street lamp is high enough to meet the radiation area requirements of many equipment; the street lamp is originally on the street. There is no need to spare no effort to install new equipment carriers; at the same time, the street lamps are still in the center of the street, which is easy to be seen and perceived; and the street lamps are inherently useful, eliminating the painful circuit modification in the smart city transformation. These geographical reasons just happened to hit the time of a collective outbreak of the technology industry. So today we can see that more complex integrated lighting poles will be installed with a number of highly integrated equipment, and the domestic intelligent street lighting industry has more than 1,000 companies of all levels. In such a huge industrial relationship, we have selected a number of technological factors that support the transformation of street lights, to see which technology equipment is installed on the small poles. 1. Combination of AI+IoT The maturity of the Internet of Things and smart city technology has made streetlight poles a fertile ground for sensors and smart cameras. First, a smart camera equipped with face recognition, flow detector and fire alarm capability became the new neighbor of the street light. Humidity, air quality, illumination illumination detection, and the need for radio frequency identification of surrounding equipment and the environment also make it possible to improve the function of the street light. In addition, Baidu, Alibaba, Tencent three Internet companies in the layout of Xiong'an last year, for the first time introduced AI (artificial intelligence) into urban public services. Intelligent street lights can be used as city data portals to provide a variety of urban services to citizens using BAT's traffic advantages. In addition, the technology and ecological platform [unicorn" enterprises in the AIOT+ big data industry have also begun to actively seek the layout of the Xiong`an new district segmentation scene. 2. Joining of network and base station In 2016, Facebook began to promote the free WiFi solution, the first solution is to use the street light pole to carry the WiFi transmitter, output high-speed free network. Such programs have gained popularity in the United States, and Chinese operators have begun to try similar solutions in southern cities. Free WiFi in the city is of course a big business, but in fact street lights can also be combined with the city's basic wireless network. In other words, the street light can be used not only as a city router, but also as a city base station for urban 4G or even 5G networks. We know that as cities become more and more dense, the demand for mobile networks in urban populations is growing. It is becoming more and more difficult to build base stations in densely populated areas of the city. Then the base station solution is placed directly on the streetlights, which becomes a kind of response. In fact, Huawei, ZTE and other telecommunications equipment service companies have begun to provide similar product technologies. This means that the street lights can also be micro base stations and city WiFi transmitter stations. With the arrival of 5G, the role of this level may continue to strengthen. 3, the needs of the car Take Shenzhen for example. As the government subsidies strengthen and the listing policy narrows, there are more and more electric vehicles, and the use of electric piles is not a big problem. And of course there are wires under the streetlights... So turning the streetlights into electric piles for new energy vehicles has become a combination. Similar programs have been applied in the construction of new cities such as Xiong'an, and even multi-function poles that can charge cars, electric vehicles and mobile phones. Another demand for cars is the need for unmanned technology to refine the environment. High-precision maps are generally collected one by one, brushed up layer by layer, of course, it is still possible to make mistakes. The light pole is equipped with an environmental sensor, and the high-precision map is connected to provide data support for the driverless car, which becomes another combination point of the light pole and the automobile. 4. Outdoor advertising with strong involvement The recent core change in outdoor advertising is the diversification of the use of screens and interactive technologies. For these two things, the street light is a good carrier. Because of the electricity, space, and network support, the light pole smart advertisement can be equipped with various technologies such as voice broadcast, display screen and interactive signage. Services such as city transportation and local business information may be provided. The above aspects are actually not comprehensive enough, but this has allowed us to see an "ideal streetlight" that can open up different signals and network transmission systems and transform into an iron man standing on the side of the road.

lighting (SSL) to replace high-pressure sodium (HPS) and metal halide lamps (MH). American Lighting Technologies announced that it will provide 1000 induction lamp energy savings to the city to save up to 40 energy consumption. Obviously, Tempe believes that LED lights are not suitable for the extreme desert climate in the southwest of the region. Alexander Ham, executive vice president of American Lighting Technology, said: After evaluating the two main street lighting fixtures, inductive streetlights and LED lights, the cost of expensive equipment for LED lights and performance instability in extreme weather in southern Arizona Considering that Tempe City chose to give up LED lights. Of course, other cities and public facilities choose induction lamps instead of LED-based solid-state lighting, mainly due to the low initial input cost of induction lamps. Whether the factors hindering the development of LEDs are climatic factors is still a question. It is well known that luminaires must be designed to conduct heat efficiently and reliably in a reliable manner. However, compared to the low temperature nights in the southwestern desert, LED lights are more reliable in high temperature areas. Of course, inductive lighting technology can indeed save energy compared to traditional technologies. American Lighting Technology Co., Ltd. will provide 70W Cobra100 series lamps to Tempe to replace 125W high pressure sodium lamps or metal halide lamps. Induction lamps do not have the ability to fine-grain dimming, and LED lights can further reduce energy consumption through adaptive control. Poor LED usage experience in Columbus, Ohio In general, LED street lights are generally well received, except for the high cost of the previous period. But according to a report on LED streetlight testing by TheColumbusDispatch, Columbus, Ohio is an exception. The newspaper said that some LED energy-saving lamps did not pass the test within two months after installation. In Dublin, Ohio, $500,000 has been allocated and LED technology will be used to retrofit 1500 street lights. Test results in Dublin show that using LED lights can reduce energy consumption by 40% to 50%. Iowa and Mississippi LED streetlights and space lighting are continuing to be promoted in most parts of the United States. The DesMoinesRegister reported that Iowa, Iowa is installing an LED-based lighting system at ValleyJunction Park, and the city will complete the installation of LED lights this fall to save 50 lighting energy. In addition, the city will use this as a pilot project for the renovation of the entire ValleyJunction Park lighting system. Solar-powered LED streetlights were installed in Lanking County, Mississippi, and the Solar Lighting Alliance also announced its first guidance document.

Is there any difference between the use of led street lights in coastal areas and inland areas, after all, the weather conditions are different in coastal areas and inland areas, and you do not need to pay special attention when purchasing led street lights. Led street lights in coastal areas may have long-term use in coastal areas with high humidity and high salt content in coastal areas. The structure of led street lamps such as lamp poles and brackets should be made of highly durable plates, and then need to be hot-dip galvanized and then sprayed to ensure the use of led street lamps in the area. When purchasing led street lamps , find out the actual engineering environment. In cold or hot areas, pay attention to the temperature requirements, and in areas with more rain, pay attention to the requirements of corrosion, so customers purchase led street lights and the buyer to clarify their product use, otherwise it will cause losses to customers

LED street light is an early application field of LED lighting. With the continuous improvement of LED technology level, the application of LED street light is more and more. This paper will discuss the application of LED street light based on the research of Shanghai LED tunnel light and street light application technology. There are a number of problems in the process, and some suggestions for improvement are proposed. I hope that I will give you a reference for the industry. First, the advantages of LED street lights 1. LED street light application range is wider than other light sources Different areas of road lighting have different considerations for light sources. For example, motor vehicle traffic areas will mainly consider brightness, total brightness uniformity, brightness uniformity and disability glare, discomfort glare control, stepless dimming and inspection of lamps. The intersection area will consider the main considerations of illumination, illumination uniformity and uncomfortable glare control. The LED light source has infinite dimming, high light control and long-distance projection, high light efficiency, high index, color and color temperature, etc. Features also make the LED street light application range wider than other light sources. 2. LED street light has less light pollution to residents and drivers Compared with high-pressure sodium lamps, the precise control of light by LED street lamps makes the light pollution to residents and drivers less. Figure 1 shows the effects of halo and stray light of different types of light source lamps on surrounding residential buildings. The left is a high pressure sodium lamp and the right is an LED street light. Figure 1 shows the effects of halo and stray light on different types of light source fixtures on surrounding residential buildings. 3. LED street lights create a safer and more comfortable road environment From the perspective of creating a comfortable light environment, LED street lights can effectively control the light intensity that strikes the human eye, creating a safer and more comfortable road and tunnel lighting environment. LED street lights are adjustable and controllable, combined with smart cities, have far surpassed high-pressure sodium lamps in terms of capabilities. 4. LED street lamp utilization is higher and more energy efficient From the comparison of light efficiency, part of the light in the high-pressure sodium lamp is lost in the casing and in the non-effective area, and the LED street lamp can distribute the light through the lens in the required area. Second, LED street light application problems and analysis LED street lights have many advantages, but there are still some problems with current LED street light applications. The following will mainly analyze the problems existing in LEDs. 1. LED street light has poor fog permeability It is generally mistaken that LED street lamps have a problem of poor fog permeability, and it is difficult to solve the problem of zebra crossing, more glare, and high light decay. In fact, Figure 2 shows the lighting effect of a 4000K LED street light and the comparison of a 3000K LED street light with a high pressure sodium lamp. When the light distribution control is appropriate, the driving direction, the residual light looks, the LED street light is neither glare, the glare is even on the ground, as shown in Figure 3. Figure 2 LED street light has poor fog permeability Figure 3 When the light distribution control is appropriate, the LED street light is neither glare nor even on the ground. In addition, from the perspective of light attenuation, attention should be paid to distinguishing false light decay. The data display of some LED street light test items shows that the false light is not bad, as shown in Figure 4. The aging light decay in the lamp room is smaller than the lens turbidity, resulting in "light decay", as shown in Figure 5. Figure 4 does not wipe the lamp, the false light decay is serious Figure 5: The aging light decay in the lamp room is smaller than the lens turbidity. 2. Some LED street lights have no lighting design requirements, simply apply "CJJ45" or no installation conditions Taking two-way six-lane, asphalt pavement, main road, and motor vehicle lane as an example, the original sodium lamp has a power of 250W. If the initial brightness value is 2 cd/m2, then 190W LED street light replacement is required. If the initial brightness value is 3cd/m2, then 285W LED street light replacement is required. Therefore, it is important to choose the brightness design value. Figure 6 LED contrast ratio of HPS