Benefiting from the government's key project procurement, LED streetlight construction continues to promote large-scale and other favorable factors, the LED street lighting series index has continued to rise in the near future, greatly stimulating the LED street lighting market. From the "Ten Cities and Ten Thousand Miles", "Thousands of Miles" to "Invisible Champions", what is the charm of LED street lighting? Today, we will explore the development status of LED street lighting and the forecast analysis of future market development from various aspects.

LED street lamp development status

Traditional light source high-pressure sodium lamps and some metal halide lamps have long played a leading role in road lighting. In recent years, LED has achieved certain success in other lighting fields, and the development of LED street lamps has opened up a broader world. Compared with traditional light sources, LEDs have outstanding advantages in terms of color rendering, energy saving, longevity and digital controllability. With the rapid development of domestic LED lighting applications, the price of LED street lamps will gradually decrease, and LED street lamps will be increasingly used in road lighting as energy-saving products.

National policy may promote the development of LED street lights

The energy-saving characteristics of LED road lamps, governments of all countries are facing this point, "installation of electricity charges will save the province", the policy naturally began to increase the installation of LED street lights, many companies have been training in the domestic market, followed by the global market.

With the development of LED street lamp standards and related policies in the mainland, in 2013, the mainland LED street lamp market is expected to exceed one million, reaching 1.32 million, accounting for 32% of the global total. If you do not distinguish between technical categories, mainland street lights account for only 15% of the world. However, with the support of the government's policies, the development of LED street lights will soon become popular. This year, the LED industry is doing a good job. Many LED companies have seen significant growth in their performance. In the future, more LED companies will be involved in the development of LED street lights.

At present, hundreds of companies have invested in the development of LED street lamps at home and abroad, and some of them have been put into mass production. Recently, the Ministry of Science and Technology of China has organized and implemented the "Ten Cities and Ten Thousand Cities" program, and has received positive responses from all over the country, creating a huge LED street lamp market. Some pilot demonstrations at home and abroad are also in full swing.

market survey

China has a large population, urbanization is developing rapidly, and road construction is also very fast. There is a great demand for outdoor lighting such as LED street lamps and LED landscape lighting. According to surveys conducted by authoritative organizations, China's outdoor lighting industry is growing at an annual rate of more than 40%. In 2014, the output value is expected to exceed US$3.5 billion, and it is expected to reach US$4.7 billion in 2015. The huge market share has made many companies rush, and it has also intensified competition.

Surveys in Kolkata, London, Sydney and Toronto show that citizens prefer LED lighting. 68% to 90% of respondents support the citywide promotion of the technology. The security and visibility improvements brought by LED lighting are the most concerned.

Experimental test

LED street lights have a life cycle ranging from 50,000 to 100,000 hours, showing that LED streetlight investment is a high-return investment. LED street light technology is durable and requires a small amount of maintenance. The failure rate of LED products exceeding 6,000 hours of use is 1%. In the same period of time, the failure rate of traditional lighting products is about 10%.

Lighting energy-saving tests show that LED technology is now mature and can be applied to outdoor lighting on a large scale, bringing economic and social benefits to the public.

LED street light in the application

Under the situation that the global energy crisis and environmental protection pressure are increasingly prominent, the application of LED light source in road lighting has become a hot spot in the semiconductor lighting industry in recent years. LED device products are applied to street lamps. What are the special requirements for technology? What are the advantages of LED street lamps compared with the current high-pressure sodium traditional street lamps? What are the shortcomings? How to solve a series of problems, it is worthy of our serious study.

Product standardization and versatility are the basis for large-scale use

At present, the LED street light, the appearance of the product, the arrangement and quantity of the luminescent particles of the LED, the size of the rectifier circuit and the internal design are various. For example, the number of single-tube power varies from 1 to 5 watts; the light distribution varies, and there are bat-shaped, rectangular, butterfly-wing, etc.; optical processing methods include self-contained lenses for secondary optics and secondary optics. The driver case has a dedicated driver chip IC and electroless capacitor; the package case has a multi-chip package and a single chip package; the technical circuit conditions include mode, group high power, chip integrated high power, dot matrix type high power, etc. . The power supply assembly also has its own integrated and external power supply, and the heat dissipation technology also has its own advantages. This brings great inconvenience to the operation and maintenance work after the universal use, and does not meet the design principle of standardization and generalization of municipal public facilities.

We believe that in the future development process, manufacturers should strictly follow the national unified standards to ensure that products are safe and reliable in terms of equipment safety and electrical performance. At the same time, LED products that have been applied in the field of urban lighting must provide the following guarantees for product standardization and uniformity.

For example, for products of different development stages of the same enterprise, it is necessary to ensure the standardization and uniformity of the main electrical components, and avoid the replacement of spare parts due to product replacement; for the products of different enterprises, the main body of the lamps, the luminescent particle board Main electrical components such as rectifier circuits must be in accordance with national standards to achieve the necessary standards and uniformity.

The corresponding national standard is the guarantee for the healthy development of the LED street lamp market.

The photoelectric and thermal characteristics of LEDs are quite different from those of conventional light sources, making the measurement of existing LEDs impossible to fully apply the measurement methods of traditional illumination sources. At present, LEDs lack appropriate standards in terms of product specifications or measurements, resulting in a wide variety of products, no standards for measurement, and non-standard markets. The diversity of products also makes it impossible for enterprises to concentrate on mass production. The development of relevant LED standards has become an urgent need of the industry. At present, the National Standards and Industry Standards for LEDs for General Lighting proposed by the National Lighting Standardization Technical Committee are expected to be promulgated and implemented in the trial stage. Relevant enterprises should carry out new market positioning and product planning, seize new opportunities, and invest necessary quality assurance measures.

Optical design and heat dissipation are the main technical problems faced by LED street lamps.

Although the development of high-power LED street lamps is very fast, there are still different levels of low lumens, low secondary light treatment, low system efficacy, fast light decay, short life, and color temperature deviation. A series of problems, such as different light colors and multiple faults in the drive. The main technical issues such as secondary optical design, thermal design and power regulator system design are the key to improving luminous efficiency and extending life.

To truly make full use of the advantages of semiconductor light sources, the secondary optical system design of LEDs is critical to the light distribution and optical output efficiency of LED street lights. Good road lighting requires that the LED street light be light-shaped in a rectangular shape. All the light from the street light can just cover the road, and the light pollution outside the road is almost zero. Dr. Jiang Jinbo from the Hong Kong Polytechnic University introduced the light distribution design of two LED street lamps: the first LED street lamp uses an axisymmetric total reflection lens or a reflector, and the LED lens module is arranged on a curved surface to produce a rectangular light distribution. . The introduction of a total reflection lens can greatly improve the utilization efficiency of light, but the arrangement of the curved LED modules makes the heat dissipation design and mechanical structure of the high power LED more troublesome. The second type of LED street light uses an asymmetric free-form lens that allows the rectangular light distribution to be directly performed by a single LED optic. The whole lamp head only needs to simply arrange the LED modules with rectangular light distribution on a flat plate. The LED street lamp is relatively simple in terms of mechanical structure, heat dissipation and power control, and road lighting of different grades of roads and different pole heights. Just add a different number of LED modules. The use of asymmetric free-form secondary optics allows the rectangular light distribution of LED street lights to be implemented directly on a single LED module. The overall street light only needs to arrange these LED module arrays in the same direction, which simplifies the design of the street lamp mechanism, heat dissipation and control power supply.

A light distribution device suitable for the light source of the package mode should be developed, and the light emitted by the light source can be more rationally and fully utilized, so that the light output efficiency of the whole lamp of the lamp is improved. At present, the radiation forms of LEDs include Lambertian, side-projection, batwing, rectangular, butterfly wing and concentrating types. Through the secondary optical design, the illumination range and luminosity curve of the LED meet the requirements of road lighting.

LEDs are used in embedded lighting fixtures. Due to the large amount of heat generated by LED chips , an important key technology in making high-power lamps is "heat dissipation." Although the luminous efficiency is getting higher and higher, the heat generation of the LED chip is still large. For every 10 degrees increase in PN junction temperature, the lifetime of semiconductor devices is reduced by a factor of two. The high temperature of the LED chip causes deterioration of the performance of the chip itself and the encapsulating resin, eventually resulting in a decrease in luminous efficiency and a shortened life.

At present, all production units have adopted different heat dissipation measures, mostly adopting a monolithic and systematic heat dissipation design concept, applying high-performance thermal conductive materials. Such as aluminum die-casting mold, aluminum extruded toothed heat sink, integral toothed heat sink, aluminum extruded profile cross-shaped heat sink, heat pipe long fin shape, external tooth structure piece, natural heat dissipation to the flow body. There is also a super-alloy heat pipe (100 times the heat transfer rate of pure copper) combined with high-density heat-dissipating aluminum fins. The heat generated by the chip is quickly converted from a point source to a line source, so that heat is evenly distributed to the heat sink. The heat sink is down to avoid dust and bird droppings. Factors such as chip packaging, lamp heat dissipation, etc. may cause light attenuation.

Price is still the biggest obstacle to large-scale application of LED street lamps

At present, the cost of LED street lamps is far more than that of high-pressure sodium lamps. The price of an LED street lamp is 4,000 yuan--8,000 yuan, or even higher, and the price of a set of imported high-pressure sodium lamps (including lamps and complete sets of electrical appliances) does not exceed 1,500 yuan. As far as the status quo is concerned, LED street lights are obviously too expensive, and the price is as high as 3-5 times. Therefore, even if the power consumption of the LED street lamp is only one-third of that of the high-pressure sodium lamp, since the price is much higher than that of the high-pressure sodium lamp, the cost recovery cycle of replacing the high-pressure sodium lamp with the LED street lamp is still very long.

Therefore, LED street lights should be officially promoted in the road lighting market, and the price and cost are still the biggest obstacles. To make LED street lights fall to the competitive price of existing lamps, the cost of each manufacturer needs to be reduced. In the near future, under the premise that the LED technology is constantly maturing and the luminous efficiency is continuously improved, the LED's life advantage and energy saving advantage can be used to make up for the disadvantage of the lamp price.

LED street lamp energy-saving renovation project is very "fragrant"

In recent years, the popularization of LED street lamps has become a trend. The LED light efficiency and safety are constantly improving. The problems of heat dissipation and cost are obviously improved, and the emergence of some intelligent products makes LED street lamps more and more affected by project owners and User's welcome.

Dongguan city LED street light renovation completed 96.8%

The author learned from the Municipal Science and Technology Bureau: In the public sector LED lighting promotion work carried out in the province from 2012 to 2013, Dongguan as of December 2013, has completed the renovation of LED street lamps by 180,114, completing 96.8% of the plan; completing the renovation of LED interior lights 213,475, accounting for 83.5% of the total planned completion. The city's leading group for promoting the development and application of LED industry said that this year will focus on supervising the completion of individual units that have not completed public lighting renovation. At the same time, vigorously promote the transformation of LED lighting in non-public areas, give full play to the role of provincial and municipal subsidy policies, and strive to complete the goal of 420,000 盏 indoor lighting renovation.

According to the statistics of the LED Leading Group of the city, 39 towns and streets in the city plan to promote 185948 LED street lights. As of the end of December 2013, the LED street lights have been completed 180114盏, 96.8% of the completed projects, and the number and completion rate are among the highest in the province; The 32 town streets have completed the annual task of streetlight renovation in the area under their jurisdiction, and the remaining towns and streets (units) are in the construction and acceptance stage. At present, all installed LED street lamps adopt provincial LED benchmark products, and the quality is stable, which fully meets the requirements of national road lighting, and has obvious power saving effect and good color rendering.

In terms of the promotion mode of LED street lamps, the number of LED streetlights completed by the EMC model accounted for 71.28% of the total number of streetlight renovations, 19.11% of the direct financial procurement models, and 1.33% of the BT models.

LED street light illuminates Guangshen high-speed annual electricity saving fee of more than 4 million

The author learned from the Guangdong Provincial Transportation Group that the Guangzhou-Shenzhen Expressway saved nearly 400,000 kWh of electricity every month after implementing the streetlight LED energy-saving retrofit last year. It is estimated that it can save more than 4 million electricity bills per year.

The Guangzhou-Shenzhen Expressway has a total length of 122.8 kilometers, spanning Guangzhou, Dongguan and Shenzhen. It has installed 6280 street lamps and implemented full-line lighting. It is the first longest LED retrofit highway in China and the first one. The road reconstruction project of the annual energy management model and the first highway using LED intelligent control.

Before the high-speed transformation, all of the 250W traditional magnetic ballast type high-pressure sodium lamps were used. The average daily lighting time was about 11 hours, and the annual electricity consumption was about 8 million kWh. In the era of energy saving and emission reduction, the problem of huge power consumption brought by street lighting has become increasingly prominent.

The person in charge of the electromechanical department of Guangzhou-Shenzhen Expressway said that the high-speed street lamp has been replaced with 100W LED energy-saving street lamps, and a remote intelligent monitoring system is adopted. Compared with the sodium lamp lighting system before the renovation, the average illumination of the modified LED street lighting system has more than doubled, and the power saving rate has exceeded 60%.

Qingyuan LED street lamp renovation completed the annual saving of electricity costs over 20 million yuan

On July 30, the LED street lamp energy-saving renovation project in Qingyuan City passed the acceptance test. According to the third-party test results, after the project is rebuilt, the road illumination and illumination uniformity have been greatly improved, and all the indicators meet the national standards and project requirements.

The project started in March 2013 and completed the project transformation in one year. A total of 237 roads with LED street lights of 47,000 baht were installed. The project's power saving rate exceeded 50%, saving more than 20 million kWh per year, equivalent to one year's lighting power consumption of 50,000 households, and annual electricity saving of more than 20 million yuan. . The project adopts the contract energy management mode. The Nanwang Energy Company is responsible for capital investment, construction, management and service. The energy-saving benefit sharing period is 8 years, and the saved electricity costs are allocated according to the ratio agreed by both parties.

It is understood that the project is by far the largest single-lamp LED street lamp energy-saving renovation project in the province, and the first urban streetlight LED retrofit project that has been publicly auctioned by the Guangdong Province since it issued the “Implementation Plan for Promoting the Use of LED Lighting Products”.

Jiangmen City LED street lamp energy-saving renovation year saves electricity costs over 6 million

Recently, the author learned from the Jiangmen City Management Bureau that the renovation of LED street lights for the main and secondary trunk roads in Jiangmen City has been completed. The energy management project for LED street lamp energy-saving renovation contract in Jiangmen City has passed the acceptance work on May 6. After the transformation, the annual electricity saving will be 6,664,800 yuan, and the annual energy saving rate will reach 72.28%.

According to the staff of the Municipal Urban Management Bureau, the project is based on the contract energy management model (the government does not need to invest, the investors invest in the transformation and return the income through saving electricity), and the original 11711 high-pressure sodium lamp in Jiangmen City is transformed into LED street light 11197盏. To achieve the goal of energy saving.

It is reported that the average annual power consumption of the original street lamps before the renovation was 100,900 kWh, and the average annual power consumption after the transformation was 2.797 million kWh. The annual electricity consumption was 7.293 million kWh, and the annual CO2 emission reduction was about 6727t. The standard coal is about 240.7t, and the annual energy saving rate of 72.28% is much higher than the original power saving rate of 50%. The energy saving benefit is better than expected.

LED street light development prospects forecast

Global LED street light installations will increase by 4 times in the next 5 years

LED lighting took off this year, and one of the major kinetic energy is the replacement of street lights. In the case of Everlight, which won 100,000 street lamps in Taiwan last year, the revenue will be NT$800 million. It is estimated that the number of global streetlight installations will increase fourfold in the next five years, including Europe, the US and China. The policy encourages the installation of LED street lights, but the most potential is still in emerging markets such as Southeast Asia and West Asia.

Ye Haofu, the chairman of LED packaging and lighting brand Daguang, said that governments in various countries have realized the energy-saving effect of LED street lamps and "imported electricity costs immediately", which have been promoted by policies.

In the United States, for example, under the Revitalization and Investment Act (ARRA), both LED road lighting projects and US-made products are encouraged. According to LEDinside data, as of the end of 2013, 600 cities in the United States have prepared or have installed LED street lights. New York City announced that it will replace 250,000 LED street lights by 2017, saving electricity and maintenance costs of 14 million US dollars per year. Year back.

In Europe, there are 20/20/20 carbon reduction and energy saving targets, which are implemented by each country; for example, the London City Government recently announced that it will replace 35,000 LED street lights before 2016, when the penetration rate will approach 70%.

As early as 2009, China proposed the "Ten Cities and Ten Thousand Cities" plan, but because there is no national standard, the quality is uneven, the street lights are frequently broken, and the progress is behind Europe and the United States. Currently, the installation progress in the rich city is relatively fast, such as the six major Guangdong Pearl River Delta. The city installed 300,000 baht of LED street lights last year. The listed companies of Taiwan LED street lamps include Yiguang and Delta Electronics. If they are not listed, they have professional manufacturers such as Hexi and Guanglin. In Taiwan last year, 250,000 street lamps were installed in 5 Dudu County, and 800,000 street lamps were still to be replaced. The price was calculated at 8,000 yuan per unit, and the business opportunity was NT$6.4 billion.

However, the largest market is still in emerging regions such as Southeast Asia, the Middle East, South America and other places. At present, there are no national standards for LED street lamps in these countries. The Taiwanese factory has the experience value of the 5 standard in Taiwan, and can be exported to the local area.

The LED industry said that although the 5th street lamp in Taiwan can focus on revenue, the profit is not good, mainly used as a model for exploring foreign markets. Last year, the original cost was 8,000 yuan for the lamp and the maintenance fee was 5,000 yuan. Later, the county and city governments removed the maintenance fee of 5,000 yuan. Recently, the future streetlights have been issued. Due to the lack of government finances, manufacturers may first bear the cost of construction and then amortize the electricity bills saved annually.

Hu Yaozu, deputy director of the Institute of Green Energy of the Industrial Technology Research Institute, pointed out that the new street lamp standard is still under discussion and has not yet been finalized. He said that Taiwan has a complete LED supply chain. In order to assist manufacturers to attack the global market, ITRI put forward the world's first LED street lamp standard in 2008, and promoted it to Poland, Thailand, the Philippines and other countries. The street lamp power supply specification allows Taiwan's street lamps to have a standard heart, and manufacturers can reduce costs.

Market share increased by 60% in 2020

The LED market is at a critical point, while white LEDs for outdoor lighting are in the early stages of the process curve. Market share is rapidly increasing and it is expected that market share will increase by 60% in 2020. A recent report by the International Labor Organization (ILO) concluded that the green economy can create about 6 million jobs. Climate organizations, Philips and their partners have called on the government to accelerate the large-scale use of urban LEDs and immediately invest in capitalization to create high-value jobs around the world.

LED street lights ushered in a replacement tide after 10 years, the replacement rate exceeded 90%

According to a research report on intelligent street lamps by Navigant, it is predicted that about 93.8% of global street lamps will be LEDs by 2023. Today, this figure is just over 53%. And from 2014 to 2017, global LED outdoor lighting will usher in the replacement tide.

The global popularity of LED streetlights is due to the global push for energy efficiency, falling prices and technological upgrades of LED street lights. However, as the price of LEDs continues to erode and the replacement rate of LED products declines, the overall revenue of street lighting will begin to decline over time. According to Navigant's forecast, global street lamp revenue will fall from $2.5 billion in 2014 to $2.3 billion in 2023. 2014~2017 will be the global era of LED outdoor lighting replacement.

Since 2014, the global LED outdoor lighting dressing tide has accelerated. More than 600 cities in the United States are planning LED street light reloading plans. New York will replace 250,000 street lamps in the city in 2017, and then replace the decorative lighting fixtures in the urban commercial district with LED lamps, which will be the largest in North America. LED street light reloading plan. In addition, there are varying degrees of dressing movements in Europe, China, and Japan. It is expected that the annual growth rate of LED outdoor lighting will exceed 20% from 2014 to 2017.

Other emerging market countries, such as Thailand, Russia, Latin America and Africa, will also see a massive wave of streetlights in 2014. Until 2015, the penetration rate of LED street lamps gradually became flat, and the growth rate began to decline. The annual scale of LED street lamp replacement and new LED street lamps will remain at around 10 million baht per year.

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September 29, 2020