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[Hardware Network] High-pressure sodium lamp enterprises are mainly distributed in the Yangtze River Delta region and the Pearl River Delta region, among which the middle and high-end products are concentrated in the Yangtze River Delta, such as Shanghai Yaming, Nanjing Sanle, Changzhou Pros, Nanjing Gaoxin Jingwei, Guangdong's famous high pressure. Sodium lamp manufacturers include Foshan Lighting and Huari Lighting. Shanghai Yaming designed the high-pressure sodium lamp in 1975, which is known as the originator of domestic high-pressure sodium lamp. Nanjing Sanle was formerly a military industrial enterprise. It is the first high-pressure sodium lamp enterprise to introduce advanced production equipment from Germany, with technical improvement and quality control. In the industry, Nanjing Sanle high-pressure sodium lamp occupied half of the country's road lighting market; Nanjing Gaoxin Jingwei is a new high-pressure sodium lamp enterprise, but the core backbone mainly comes from Nanjing Sanle. After cooperation with the US GE, its development momentum Extremely fast, and generally optimistic about the industry.
According to the data, there were 18 enterprises producing high-pressure sodium lamps in 1999, with an annual output of 6.79 million high-pressure sodium lamps, including 2 enterprises with an annual output of more than 100,000: Shanghai Feiya Lighting Co., Ltd. and Nanjing Sanle Electric Corporation. There are 5 enterprises with an annual output of 500,000-800,000: Jiangsu Yizheng Electronic Tube Factory, Shenyang Huaguang Bulb Factory, Zhejiang Lanxi Xinda Lighting Company, Beijing Dahua Ceramics Factory, Nanjing Gaoxin Jingwei Electric Co., Ltd. The annual output of the above seven enterprises totaled 5,417,700, accounting for 79.8 of the total output. The remaining 11 enterprises have an annual output of 1,372,300, accounting for 20.2 of the total output. After more than 10 years of development, the number of high-pressure sodium lamps has reached 50, but compared with the development of LED blowout, high-pressure sodium lamps are undoubtedly a major category.
High luminous efficiency and affordable price Although the number of enterprises is limited, high-pressure sodium lamps stand out from many light source products, firmly occupy the dominance of the road lighting market, and have not been eliminated for many years, high-pressure sodium lamps must have their unique advantages. Li Hanmao, executive vice president of Guangdong Aoteli Lighting Co., Ltd., told the author that the biggest advantage of high-pressure sodium lamps is high luminous efficiency. The luminous flux of ordinary high-pressure sodium lamps is above 110 lm/w, while for some high-end products, the luminous flux can reach 130-100 lm/w. At present, the luminous flux of the energy-saving lamp is 70-80 lm/w; the luminous flux of the metal halide lamp is about 100 lm/w; and the luminous flux of the LED is about 60 lm/w. It can be seen that in the current popular light source products on the market, the light effect of the high pressure sodium lamp is unmatched by other products. At the same time, after market inspection, the service life of high-pressure sodium lamps can reach more than 10,000 hours. Once the LED street lamp is broken, the whole lamp should be replaced. The high-pressure sodium lamp is different. As long as the light source part is replaced, the installation and maintenance cost is low, which is also a big advantage of the high-pressure sodium lamp.
Affordable price is a major reason for the long-term favor of high-pressure sodium lamps. According to Ding Yungao, deputy general manager of Huari Lighting, high-pressure sodium lamps have certain advantages in terms of price compared with metal halide lamps. For example, the current 250W metal halide lamps on the market, the ex-factory price of domestic manufacturers is 40-50. Between the yuan, and the same 250W high-pressure sodium lamp, the domestic ex-factory price is generally 15-20 yuan.
Poor color rendering into fatal injuries Compared with other light source products, the quality of high-pressure sodium lamps is much higher. On the one hand, enterprises engaged in the production of high-pressure sodium lamps are established companies such as Shanghai Yaming, Foshan Lighting, Nanjing Sanle, etc. The quality management system of these enterprises has been perfected. On the other hand, the entry threshold of high-pressure sodium lamps is relatively high, and it is not suitable for circulation in the market. SMEs generally do not intervene in this field. It is understood that in the second quarter of 2010, the Shanghai Municipal Bureau of Quality and Technical Supervision conducted a special supervision and spot check on the quality of high-pressure sodium lamp products produced in Shanghai, and the pass rate of spot checks reached 100. Product technology, product quality, and the number of companies are relatively stable. This is the consensus of the industry on the formation of high-pressure sodium lamps.
June 18, 2021