Technology development of LED street lamps
At present, the appearance of LED street lamps, the arrangement and quantity of LED luminescent particles, the exterior size of rectifier circuit and internal design are various.
Power supply assembly also has its own integration and external power source two, heat dissipation technology has its own advantages and disadvantages, which all to the widespread use of the operation and maintenance work to bring great inconvenience, also does not conform to the municipal public facilities standardized, universal design principles.
Optical design and heat dissipation are the main technical problems faced by LED street lamps. Although the development of high-power LED street lamp is very fast, but in the application of varying degrees of the existence of tile lumen low, secondary light efficiency processing level is low, the system light efficiency is low, fast light decay, short life, color temperature deviation, light color is not the same, the driver many faults and other problems. Among them, secondary optical design, heat dissipation design and power regulator system design are the key to improve luminous efficiency and prolong life. Currently, LED radiation forms include lambert-type, side-shot type, bat-wing type, rectangle type, butterfly wing type and concentrator type. Through the secondary optical design, the illumination range and luminosity curve of LED meet the requirements of road lighting.
As the technology continues to mature, the energy-saving effect of LED street lamps becomes increasingly prominent. In particular, the intelligent control feature of LED not only strengthens the advantages of LED street lamp products, but also greatly improves the energy-saving space of road lighting system. Therefore, in the current context of energy conservation and emission reduction, local governments widely promote LED street lighting products.
LED street lamps have the greatest development potential
According to industry experts, LED street lamps will maintain a compound annual growth rate of around 50% until 2015, and the overall penetration rate of LED lamps in the field of road lighting (mainly street lamps and tunnel lights) will reach 46% by 2015, and more than 30 million LED street lamps and tunnel lights will be added in the next two years. All these favorable expectations bring greater development potential to LED street lamps.
Emerging markets are in for a dressing down
In emerging markets such as India, Russia, southeast Asia (Vietnam, Indonesia, Malaysia, Thailand), Latin America (Brazil, Mexico, Argentina, Colombia) and Australia, LED outdoor lighting related policies and retrofitting projects are gaining increasing attention. In addition, major cities in Australia, Argentina, Colombia and India have started LED street lamp installation projects.
In the north American market, by the end of 2013, more than 600 cities in the United States had installed or were planning to install LED street lights, and New York City planned to replace 250,000 street lights in 2017. In addition, most provinces and cities in Canada are also actively carrying out LED street lamp replacement plans or carrying out replacement incentive plans.
The European lighting market is no less impressive. European LED street lamps are less sensitive to price than other areas, but they are quite strict about quality.
The long-term goal of the Japanese government is the lighting engineering and infrastructure construction related to the 2020 Olympic Games. At present, the construction of the relevant construction industry has been officially started, and the project plans to introduce LED lighting and OLED lighting to attract international attention. In addition, the signing of the international mercury convention will bring new business opportunities for LED lighting.
LED street lamp field presents the following characteristics:
1. The overall environment of LED street lamps tends to be stable.
2. This year, LED street lamps have made great progress in terms of overall road illumination, uniformity and glare control. However, due to the tight market demand and the large base of LED street lamp manufacturers, the market competition is fierce. In the future, LED street lamp manufacturers will not only strive for quality but also strive for price. Seeking new economic growth points is also the target of LED street lamp manufacturers.
3. LED street lamp structure design changes, light source modularization becomes a new trend in the future. The previous integral and modular design once the lamp problems must be replaced, but after the light source modular will only replace the electric control part, although from the point of view of a single lamp did not save cost, but in the long run the cost is lower.
4. The application of intelligent control system in LED street lamp is gradually increasing. Many street lighting enterprises at home and abroad began to devote themselves to the research and development of intelligent LED street lighting, such as philips, GE and other international giants, frequently on the photoelectric, low-light electronics, Yang fa and other domestic up-and-coming stars. The intelligent LED street lamp can save 10% to 20% more energy than the original LED energy-saving technology, but the stability of the intelligent LED street lamp system is insufficient, the failure rate has doubled than the original, and the control system may break down faster than the lamp.