[Text / high-tech LED Gan Qin] Due to the double impact of the continuous decline in prices and the slowdown in demand growth, the domestic sales of LED street lamps in China is declining year by year, which may also indicate that the domestic LED street lamp market will enter the "winter" period. . According to a survey conducted by the High-tech Research Institute LED Research Institute (GGII), in 2014, the domestic LED street lamp domestic sales market fell sharply to 2.8 billion yuan, down 30.9% year-on-year. In 2015, the market size of street lamps is expected to be 2.3 billion yuan, down 16.6% year-on-year. In the whole year of 2015, the street lamp domestic market is still not optimistic, and there will be no tendency to double the growth in previous years. The financial report shows that the outdoor lighting company Qinshang Optoelectronics (002638.SZ) in the first half of 2015, the outdoor lighting business revenue fell 23.31% year-on-year, Qu Yangyi, chairman of Liyang Optoelectronics, said that the reasons for the slowdown in outdoor lighting growth are partly due to the policy level and interest-driven aspects, but more should be analyzed at the technical level. Color temperature and efficacy and cost price factors are constraints on LED outdoor lighting. The main reason for the slow development of lamps. Talking about the technical level, Qu Junyi believes that the direction of street lighting in the future must be promoted from high color temperature to low color temperature. The industry will experience an evolution of color temperature values ​​from 6000K to 4500K to 2850K. In his view, the future 2850K will be the color temperature required for optimal road lighting. "Therefore, the future development trend of outdoor street lights will focus on the development direction of low color temperature, high light efficiency and low cost." Qu Junyi said. "The 2850K color temperature penetration is excellent. Whether it is fog or rain or fog, it can provide people with a clear lighting environment instead of blinding the human eye." Qu Junyi said that the color temperature value can make the LED light color completely Return to tradition. Hu Shuangneng, director of Getian Optoelectronics Market, said, “At present, the color temperature values ​​of LED street lamps are mostly concentrated at 4000-4500K, and the color rendering index is around 60-70Ra. The specific color temperature values ​​cannot be generalized.†However, Hu Shuangneng also pointed out that “it is worth noting that the higher the color temperature value, the lower the penetrating power, the more unsuitable for rain and fog weather. If the street light is a high color temperature light source, the range of vehicles and pedestrians at night is small and difficult to see clearly. Far-away objects are more prone to accidents." It is understood that Liyang Optoelectronics should launch a combined solution for this problem: low cost + high luminous efficiency + low color temperature, its street lamp module color temperature CCT = 2850K, light efficiency up to 150 LM / W, while the cost is 20% more than the industry products -30%. In addition to seeking to open the LED street lighting market in terms of technology and cost, in order to increase the added value of LED street lamps, outdoor lighting companies have made more efforts in the intelligent direction. Qu Junyi said, “We started to set up a team to develop software for LED lighting intelligent control system in 2013, and the products have been put into use in road lighting.†Qu Junyi believes that the street lamp intelligent control system can automatically send commands to various terminals in the city, and automatically adjust the color temperature of the LED street lights according to the weather conditions. Whether in the case of rain or fog weather or fine weather, the color temperature can be adjusted appropriately to improve the driving vehicles and the traffic. Pedestrian visibility for enhanced security. In addition, from the participation in the selection of the high-tech Golden Globe Awards this year, it can be seen that the smart cards produced by enterprises are also more concerned with the adjustment of color temperature. Zhonglong Transportation won the Best Product Award of the Year with the Promise Dimming Color Temperature LED Tunnel Light. The lighting system of the product uses intelligent control, and the lamp can realize the function of stepless dimming color temperature. The person in charge of Zhonglong Transportation pointed out that the streetlight control system adjusts the color temperature of the LED according to the change of the weather temperature through the induction system. For example, when the weather is cold, the color temperature can make the pedestrian feel warmer. When the weather is hot, the color temperature will be raised appropriately. Give the pedestrian a more refreshing feeling.
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