WHAT IS LED STREET LIGHT? (1)

- May 07, 2020-

Street lamps refer to lamps that provide lighting to roads, and generally refer to lamps within the range of road lighting in traffic lighting. Street lamps are widely used in various places that need lighting.

Fire is the history of human development is a history of entrepreneurship in pursuit of light. The use of fire is an important milestone in the progress of human civilization. The bonfires lit by ancient ancestors were the earliest lights.


United Kingdom: It is the beginning of the 15th century when humans tried artificial lighting on city streets. In 1417, in order to brighten the dark night of London in winter, the mayor of London, Henry Barton, issued an order to hang lamps for outdoor lighting. Later, his proposal was supported by the French. At the beginning of the 16th century, lighting fixtures had to be installed outside the windows facing the streets of Parisian residences. At Louis XIV, many street lights appeared on the streets of Paris. In 1667, Louis XIV, known as the "Sun King", also officially promulgated the Urban Road Lighting Act. According to legend, it was precisely because of the promulgation of this decree that Louis XIV's rule was called the "Bright Age" in French history.

kind

1. According to the height of street lamps: high pole lamps, middle pole lamps, road lamps, courtyard lamps, lawn lamps, underground lamps;

2. According to the lamppost material of the street lamp: hot galvanized iron street lamp, hot galvanized steel street lamp and stainless steel street lamp;

3. According to the street light source: sodium lamp street lamp, LED street lamp, energy-saving street lamp, new Xingming xenon street lamp.

4. According to the shape: Chinese lamps, antique lamps, landscape lamps, single-arm street lamps and double-arm street lamps.

5. Divided by power supply method: city circuit lights, solar street lights, wind and solar complementary street lights

Street lamps involve lighting technology and are suitable for street lamps. The purpose is to design a high-efficiency electronic energy-saving street lamp with long life, low power consumption, high power factor and small current harmonic content. The high-efficiency electronic energy-saving street lamp includes sequentially connected power grid high-pressure discharge branches R1, C1, rectifier bridges D1-D4, power factor correction branches C2, D5, D6, high and intermediate frequency glitch filter branches L1, L3, high-frequency oscillation circuit BG1-BG2, start branch L2, C7 and lamp T; save 80% of electricity than previous street lamps; harmonic content THD <25%, extend lamp life by 3-4 times.

classification

Street lamp

Street lamp

Street lights are usually classified according to the shape of the emitted light. For the specific division method, the International Commission on Illumination (CIE) recommends that it should be based on three items: projection, expansion, and control.

① Projection. It indicates the degree of diffusion of the light emitted by the lamp along the longitudinal direction of the road, which is divided into three types: short, medium and long.

②Expansion. It indicates the spread of the light emitted by the lamps in the lateral direction of the road, which is divided into three types: narrow, normal and wide.

③Control. Indicates the degree of glare control of lamps and lanterns, divided into three types: limited, medium and strict.

There are several ways to install the street lamp: bracket type, high type, straight rod type, suspension cable type and suction wall type (see figure).

The stock of street lamps in China ranges from 28 million to 30 million. In recent years, the number of newly added street lamps is 15% -20%, about 3 million-6 million lamps. New every year

Street lamp

Street lights (20 photos)

 The number of Zeng street lamps is all LED lamps. The annual increase is 1,000-2,000 yuan, and the annual increase is 3 billion-6 billion yuan. The failure rate of LED street lamps used for more than 6000 hours is less than 1%. Lighting accounts for about 19% of the electricity consumption in the world. If the efficiency of the lighting system used in the world is doubled than the current one, it can be said to be equivalent to removing half of the electricity consumption and heat removal in Europe. A global independent experiment has been established a few days ago. LED street lights can save up to 85% of energy. In December 2011, China produced 250 million sets of lamps and lighting devices, a year-on-year increase of 12.45%. From January to December 2011, the output of lamps and lighting devices nationwide reached 2.5 billion units, an increase of 6.38% year-on-year. Judging from the output of various provinces and cities, from January to December 2011, the output of lamps and lighting devices in Zhejiang reached 1.07 billion units, an increase of 9.13% year-on-year, accounting for 42.40% of the total output of the country; the output of lamps and lighting devices in Guangdong reached 870 million sets, a year-on-year decrease of 4.44%, accounting for 34.43% of the country's total output. In 2011, China's LED market will grow from 4.7 billion US dollars in 2010 to 5.8 billion US dollars, an increase of 23%. LED has become a popular product made in China and is an attractive investment area. In addition, government support for the industry seems to be producing results. It is expected that the Chinese LED market will reach USD 6.9 billion in 2012 and USD 11.1 billion by 2015, with a compound annual growth rate of 17.7% from 2010 to 2015. China's street lighting construction has achieved rapid development, the quality of road lighting has been continuously improved, and high-intensity gas discharge lamps have been widely used to improve China's investment environment, promote rapid economic development, facilitate people's lives, beautify the city and serve as an outward-oriented modern city Has played a big role.


Market outlook forecast


The 51 report online data shows that the total number of Chinese street lamps is 9,186,356. The annual electricity consumption of urban lighting (only functional lighting such as landscape lighting and street lights) accounts for about 4% to 5% of China's total power generation, which is equivalent to the annual power generation capacity of the Three Gorges Hydropower Project under construction (85 billion kWh) ). Street lights will be the largest application area, reaching US $ 1.5 billion in 2011 and is expected to reach US $ 1.8 billion in 2012. In 2012, with the pressure of energy saving and emission reduction, the acceptance of LED street lights increased significantly. All local governments are accelerating the promotion of LED street lights. Chongqing plans to install 50,000 LED street lights within two years; 

Henan Zhengzhou plans to promote and install 78,000 LED street lights before 2015; Jiangsu Yangzhou plans to use LED lighting products for 100% of secondary road lighting and community lighting by 2015, and 30% of cities Main road lighting and LED lighting products are used, and the demand for LED street lights reaches 50,000; Hainan Province plans to replace the province's 210,000 street lights with LED street lights at the end of 2012; not only domestically, many countries in foreign countries have begun to start energy saving and emission reduction Plan, the promotion of LED street lights is one of the main measures of the energy saving and emission reduction plan. In 2012, China's total output of LED street lamps will reach 1.22 million, an increase of 79% year-on-year. As the most critical component of LED street lamps, LED street lamp driving power will also develop rapidly in 2012 with the rapid promotion of LED street lamps. It will be an opportunity for LED street lamp driving power companies with technical and financial strength as support . It is predicted that by 2020, LED's market share in China's lighting market will reach 80%, China will become the world's largest LED lighting market, the market size will exceed one trillion yuan. From January to December 2011, the output of lamps and lighting devices nationwide reached 2.5 billion sets. In 2012, it was 2.8 billion units. By 2016, the output will reach 4 billion units. The market demand will expand from 2 billion units in 2011 to 2.4 billion units in 2012. It is expected that the market demand will exceed 3.5 billion units in 2016.


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