Street lamps, refers to the road to provide lighting function lamps, refers to traffic lighting in the range of road lighting. The Xu of the words "the memory of the fragments": "Pedestrians are scarce, and the streetlights are dim." The history of human being is a history of the pursuit of light, and the use of fire is an important milestone in the progress of human civilization. The bonfire lit by ancient ancestors was the first light. At the beginning of the road lamp on each pole to install a knife switch, still need to open the workers every day closed. 3 years later, the use of a number of street lamps to share a switch, this form of street lamps in all cities throughout the country until the the 1950s.
Street lamps involve lighting technology and apply to street lights. The aim is to design an efficient electronic energy-saving street lamp with a long life, low power dissipation, high power factor and small current harmonic content. The high-efficiency electronic energy-saving street lamp includes a sequential connection of the power grid high-voltage discharge slip R1, C1, Rectifier Bridge D1-D4, Power factor correction Branch C2, D5, D6, High frequency Burr filter Branch L1, L3, high-frequency oscillation circuit Bg 1, start branch L2, C7 and tube t; compared to the previous street lamp can save 80%; harmonic content Thd, prolong the lamp life can reach 3-4 times.
National lamps and lighting equipment production reached 2.5 billion sets, year-on-year growth of 6.38. From the production of provinces and cities, 2011 1-December, Zhejiang Province lamps and lighting equipment production reached 1.07 billion sets, a year-on-year growth of 9.13, accounting for 42.40 of total production, Guangdong province lamps and lighting equipment output reached 870 million sets, a year-on-year decline of 4.44, accounted for 34.43 of the total national production. The 2011 China led market will grow from $4.7 billion in 2010 to $5.8 billion, rising 23, led has become a hot product made in China, and is an attractive investment area. In addition, government support for the industry seems to be having an effect.