Unexplained high-pressure sodium lamp companies are under tremendous pressure

High-pressure sodium lamp companies are mainly distributed in the Yangtze River Delta region and the Pearl River Delta region, in which high-end product companies concentrated in the Yangtze River Delta, such as Shanghai Yaming, Nanjing Sanle, Changzhou Pros, Nanjing high-tech latitude and longitude, Guangdong famous high-pressure sodium lamp production companies have Foshan Lighting and Huari Lighting. Shanghai Yaming designed stereotyped high-pressure sodium lamps in 1975 and was honored as the originator of domestic high-pressure sodium lamps. Nanjing Sanle, formerly known as a military-industrial enterprise, was the first high-pressure sodium lamp company to introduce advanced production equipment from Germany, with technical improvements and quality control. In terms of industry reputation, Nanjing Sanle High Pressure Sodium Lamps accounted for half of the entire road lighting market in China during the peak period; Nanjing Gaoxin Jingwei is a new high pressure sodium lamp company, but its core backbone mainly comes from Nanjing Sanle. After its cooperation with US GE, its development momentum Extremely fast, generally favored by industry professionals.

According to statistics, in 1999, there were 18 companies producing high-pressure sodium lamps throughout the country, and annual output of 6.79 million high-pressure sodium lamps, including 2 companies with an annual output of more than 100,000 pieces: Shanghai Feiya Lighting Company and Nanjing Sanle Electrical Appliances Corporation. There are five enterprises with annual output of 500,000-800,000 branches: Jiangsu Yizheng Electronic Tube Factory, Shenyang Huaguang Bulb Factory, Zhejiang Lanxi Xinda Lighting Company, Beijing Dahua Ceramics Factory, and Nanjing Gaoxin Jingwei Electric Appliance Co., Ltd. The total annual output of the above 7 enterprises is 5,417,700, accounting for 79.8% of the total output. The remaining 11 companies have annual production 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 about 50, but compared with the blow-out development of LEDs, high-pressure sodium lamps are undoubtedly a big hit.

High luminous efficiency and affordable Although the number of companies is limited, high-pressure sodium lamps stand out from many light source products and 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 reporter that the biggest advantage of high-pressure sodium lamps is high luminous efficacy. The luminous flux of common high-pressure sodium lamps is over 110 lm/w, while some high-end products have a luminous flux of 130-100 lm/w. Currently, the luminous flux of energy-saving lamps is 70-80lm/w; the luminous flux of metal halide lamps is about 100lm/w; and the luminous flux of LEDs is about 60lm/w. It can be seen that in the light source products that are currently popular on the market, the efficacy of high-pressure sodium lamps cannot be achieved by other products. At the same time, after the market inspection, the service life of high-pressure sodium lamps can reach more than 10,000 hours. If the LED street light is broken, the whole lamp should be replaced. The high-pressure sodium lamp is different, as long as the light source part can be replaced, the installation and maintenance cost is low, which is also a major advantage of the high-pressure sodium lamp.

Affordability is a major reason for the long-term favor of high-pressure sodium lamps. According to Ding Yungao, deputy general manager of Huari Lighting, compared with metal halide lamps, high-pressure sodium lamps have certain advantages in terms of price. For example, there are 250W metal halide lamps on the market, and the ex-factory price of domestic manufacturers is generally 40-50. Between the yuan and the same 250W high pressure sodium lamp, the domestic ex-factory price is generally 15-20 yuan.

The poor color rendering becomes fatal. Compared with other light source products, the quality of high pressure sodium lamp products is much higher. On the one hand, companies engaged in the production of high pressure sodium lamps are old companies, such as Shanghai Yaming, Foshan Lighting, Nanjing Sanle, etc. The quality management system of these companies has been very well-established; on the other hand, the barriers to entry for high-pressure sodium lamps are relatively high and they are not suitable for circulation in the market. SMEs generally do not intervene in this area. It is understood that in the second quarter of 2010, the Shanghai Bureau of Quality and Technical Supervision conducted special supervision and spot checks on the quality of high-pressure sodium lamps produced in Shanghai, and the qualified rate of spot checks reached 100%. Product technology, product quality, and the number of companies are relatively stable. This is the consensus of industry insiders on the formation of high-pressure sodium lamps.

It is understood that the high pressure sodium color rendering index Ra is 20-40, metal halide lamp color rendering index Ra above 70, while the electrodeless color rendering index Ra is above 80. It is because of the delay in color rendering that the high-pressure sodium lamp can only basically be applied to road lighting and locations where color rendering is not required. Although China's urbanization construction has created a continuously increasing demand for high-pressure sodium lamps, this demand is negligible compared to the vast lighting market space.

The rise of alternatives such as metal halide lamps, LED lamps, and electrodeless lamps has caused the high-pressure sodium lamps to fall into an embattled position.

The metal halide lamp is a light source product made by adding various metal halides on the basis of a high-pressure mercury lamp. Such a light source product has the characteristics of high luminous efficiency, good color rendering performance, long service life, and the like, and is a new energy-saving approach to daylight color. Light sources are widely used in indoor lighting in stadiums, exhibition centers, large shopping malls, industrial plants, street plazas, stations, and docks. Previously, the core technology of metal halide lamps was mainly in the hands of international giants of the lighting industry. Until recently, domestic lighting companies broke through the technical difficulties of metal halide lamps. At present, there are about 30 metal halide lamp manufacturers in China, such as Shanghai Yaming, Foshan Lighting, Pross Lighting, NVC Lighting, Jiamei Lighting, and Foshan Huaquan Lighting.

In recent years, Solenka, Priests, Sidenda, Greenland and other electrodeless lamp companies have sprung up and also seized a lot of market share of high-pressure sodium lamps. High-efficiency light, low light decay, long life, and high color rendering make electrodeless lamps attractive to many investors and users. At present, there are more than 100 electrodeless lamp manufacturers in China, mainly in Jiangsu Province.

LED is one of the most popular light source products. In early 2009, in order to expand domestic demand, promote the development of China's LED industry, and reduce energy consumption, the Ministry of Science and Technology of China has launched the “Ten City Million” semiconductor lighting application demonstration city plan. The plan covers 21 domestic developments in Beijing, Shanghai, Shenzhen, and Wuhan. city. This major move has brought unprecedented pressure on the high-pressure sodium lamp company, because once the pilot is successful, it may mean the end of the era of high pressure sodium lamp.

It is understood that, given the advantages and disadvantages of high-pressure sodium lamps and metal halide lamps, international light source companies have long been studying alternatives to street light sources. According to Ding Yungao of Huari Lighting, Philips has introduced the latest series of light source products, Cos-mopolis (Chinese name: Cosmao). This light source product has a high luminous efficiency and a compact appearance, and is a high-efficiency and high-efficiency lamp for high pressure sodium lamps. The high color rendering index performance of metal halide lamps is a new generation of revolutionary light source. "I think the future of street light sources will surely be the world of Cosmopolis. Our company is also stepping up efforts to develop such products." Ding is always confident about the market prospect of Cos-mopolis.