1.1 The shortage of traditional street lamps Traditional street lamps mainly use high-pressure sodium lamps, and metal halide lamps also account for a certain share. High-pressure sodium lamps have two types of high luminous efficiency and high color rendering. High-intensity high-pressure sodium lamps have poor color rendering, which causes serious distortion of the color of the object being illuminated; high-color sodium lamps with high color rendering have lost luminous efficiency and longevity, and because of their short life, they are often expensive. High altitude maintenance operations. Although high-pressure sodium lamps and metal halide lamps have higher luminous efficacy than incandescent lamps, when applied to road lighting fixtures, only 40% of the light is directly incident on the road surface, and other light is projected through the reflector. The reflector efficiency of such lamps is only 50% 60%, and the lamp efficiency is only about 70%. The reflector design is difficult, and the light demand is really small. Generally, the illumination in the direct illumination direction is too large. At the intersection of the two light lines, the illumination is too small, resulting in poor uniformity of road lighting. 1.2 Advantages of Light Emitting Diode (LED) Street Lights Compared with traditional gas discharge circuit lamps, LED road lamps have many advantages, mainly in the following aspects. 1 power saving, power saving effect of more than 30%; 2 road lighting uniformity, three light distribution design can make most of the light projected onto the road surface, the overall light efficiency of the lamp is easily up to 50 lm / W; 3LED street light output White light color rendering is 65, color temperature is moderate (5 0006 000 K), light color is more natural than high-pressure sodium lamp; 4 high-pressure sodium lamp, metal halide lamp extinguished after hot start time is up to 36 min, and LED lamps can work normally In the continuous switch state; 5LED lamps can be continuously dimmed from 0100%; 6 long life, LED street lamp life can reach 50,000 hours under good heat dissipation conditions, which effectively reduces maintenance work and reduces operating costs. Although the price of each high-pressure sodium lamp is currently around 1,000 yuan, and the price of each LED street lamp (lamp) is about 5,000 yuan, the LED street lamp can recover the initial input cost due to the electricity cost savings within 4 years, and the lighting cost of the entire LED street lamp. It is much lower than the high pressure sodium lamp. Driven by the “Ten Cities and Ten Thousand Miles†plan, China’s streetlights have developed rapidly. China launched the “National Semiconductor Lighting Project†in 2003. This is the first time since the implementation of the “Green Lighting Project†in 1996, the Chinese government has increased energy conservation and emission reduction. Another major strategic move taken in terms of strength. Since the implementation of the “National Semiconductor Lighting Project†in China, the semiconductor lighting industry has grown rapidly. At present, there are more than 4,000 enterprises engaged in the LED industry. In 2008, the total output value of the LED industry was about 70 billion yuan. In 2010, the total output value of China's LED industry will exceed 150 billion yuan. The Ministry of Science and Technology launched the “Ten Cities and Ten Thousand Cities†in December 2008. Demonstration project plan. In the spring of 2009, the Ministry of Science and Technology increased the number of 10 cities including Xiamen, Tianjin and Shanghai to 21. The “Ten Cities and Ten Thousand Miles†plan is divided into three phases. The first is the pilot phase (2009). In 2009, 1 million LED municipal lighting fixtures were used, including road lighting, tunnel lighting, subway cars and platforms, underground parking lots and gas stations. In the pilot phase, the localization rate of LED is required to be 60%, and the annual energy saving is 220 million kWh. The main content of the pilot phase also includes the development of model standards, evaluation and acceptance, and the strengthening of product standards and testing platforms. The second is the demonstration phase (2010, 2012). In 2010, 50 semiconductor lighting demonstration cities were built nationwide, and 2 million LED municipal lighting fixtures were applied. The localization ratio is 70%, and the annual power saving is expected to reach 1 billion kWh. The work content also includes regular product guides and excellent products. The list of enterprises, and the Ministry of Finance and the Ministry of Science and Technology research and develop subsidy standards, and provide financial subsidies to the demonstration cities. The third is the promotion phase (20132015). In 2015, LED lighting entered the 30% general lighting market. It is expected to save 140 billion kWh per year, create more than 1 million jobs, and strive to become the world's third largest LED lighting industry. The work content of the promotion stage is to form a mature marketing model through the pilot stage, reaching 30% of the country's general lighting using semiconductor lighting. After the launch of the “Ten Cities and Ten Thousand Miles†program, many local governments outside the 21 pilot cities have actively applied for the hope of becoming a pilot city. At present, LED street lights have already lit up hundreds of cities across the country. In 2009, many domestic industries experienced a decline due to the impact of the global economic crisis, while the LED industry staged a good show against the market, which greatly benefited from the launch and implementation of the “10 Million ç›â€ program. At present, the market penetration rate of global LED street lamps is only about 1.2%, and the market penetration rate of LED street lamps in China is higher than the global average. Many local governments in the country want to take the lead in the development of the LED industry for their own cities. For example, since 2009, Guangdong Province has implemented the “Thousand Miles of 100,000†LED Street Light Industrialization Demonstration and Promotion Project. It plans to build about 1,500 kilometers in 10 cities including Guangzhou, Foshan, Shenzhen, Dongguan and Huizhou within two years. 100,000 LED street light demonstration and promotion project. In 2009, only Dongguan City applied 20,000 LED street lights, and plans to complete the application of 80,000 LED street lights by 2015. Chengdu has formulated the “Chengdu LED Lighting Product Application Plan (2010-2012)â€. It plans to promote 12,000 LED street lamps in two years, and it has used 3 years to promote the application of various LED lamps of 385,000 baht. Yangzhou plans to invest 330 million yuan in 20102011 to apply 50,000 LED street lights to upgrade the city's road lighting. At present, LED street lamps have become a hot spot in the development of China's semiconductor lighting industry. LED street lamps have swept the land of China, and China has become a testing ground for global LED street lamps. The “Ten Cities and Ten Thousand Cities†program has enabled China's semiconductor lighting industry to rapidly strengthen in the face of a severe economic crisis around the world, enabling people to see the huge business opportunities of the LED industry and its bright future. At present, there are thousands of enterprises that have invested in LED street lamps nationwide, and global LED manufacturers are all eyeing. The street lamps rushed to the ground and blossomed in full, hiding huge risks and rushing upwards. It is a solid disease in China's economic development. In the past year or two, the development of LED street lamps in China has once again been repeated. Behind the heat of LED street lights, you need a rational call. The implementation steps of the “Ten Cities and Ten Thousand Miles†plan were originally “first pilot, post-demonstration, and promotionâ€, and the fact is that it has not been piloted and is fully blooming, with great blindness. At present, the global semiconductor lighting industry has just started in the mainstream lighting field, and it is still in its infancy. LED lights have not entered the family, enterprises and office buildings in batches. In this context, the comprehensive promotion of LED street lights is an advanced move. LED street light is a high-end application product of LED, and its technical content and production difficulty are much higher than LED lighting. LED street light has relatively large power, long continuous ignition time after start-up, and the application environment is very harsh. It is designed to solve a series of technical problems such as electromagnetic interference/electromagnetic compatibility (EMI/EMC), power factor correction (PFC), light distribution and heat dissipation. . At present, in some developed countries in Japan, South Korea and Europe and the United States, the research on LED street lamps is still in the trial and small-scale pilot phase. In the case that China's semiconductor lighting technology and industrial strength are far behind these countries, the immature LED street light samples will become products and commodities, blindly launched, blind investment, low-level repeated construction, blindly transforming regardless of benefits and consequences, In line with the original intention of the "Ten Cities and Ten Thousand Miles" plan, it will also cause huge waste of resources and energy. In the promotion and application of LED street lamps, even if one-tenth of the products have problems, consumers will lose confidence, create a crisis of trust, and cause damage to the semiconductor lighting industry. Energy-saving lamp electronic ballasts have replaced inductive ballasts for more than 20 years, but high-pressure sodium lamps and metal halide lamps are still using inductive ballasts because high-pressure sodium lamps and metal halide lamps are not yet mature. . The LED street lamp driving circuit powered by AC power is no less difficult than the high-pressure sodium lamp and metal halide lamp electronic ballast, not to mention the LED street lamp to solve the problems of light distribution design and heat dissipation. At present, a considerable number of LED street lamp companies lack the knowledge and technology of LED street lamp design, and enterprises that can make LED street lamps better are even less popular. In 2009, many LED streetlight companies suffered serious losses, which is reasonable. In order for LED street lights to illuminate the future, we must first illuminate our feet. At present, developed countries are very cautious about the promotion and application of LED street lamps. China's large-scale promotion and application of LED street lamps is far from having a technical basis and basic conditions. China is a developing country with no financial support to become a testing ground for global LED street lights. LED street light promotion, there is still a long way to go, it is a long way to go. Smart Watch For Men Smart Watch For Men everyone enjoys luck , http://www.eeluckwatch.com