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However, the reporter recently learned during interviews with industry experts that the current popularity of LED lighting still faces technical and price constraints. It will take some time to replace the current lighting products.
Significant advantage
Why are LED lights so sought after? Gao Ming, head of the lighting technology team at GE China R&D Center, told reporters that the efficacy of traditional incandescent lamps is only 10 lumens per watt, while LED lamps can reach 70 to 80 lumens per watt, so LEDs are more effective than incandescent lighting. High and energy efficient. In terms of service life, LED lamps can generally reach more than 25,000 hours, which is more than 20 times higher than traditional incandescent lamps.
In addition, LED lights can be designed in different shapes and sizes depending on the application, which is an advantage that incandescent lamps do not have.
Due to the high energy consumption of incandescent lamps, since 2008, China has launched the “green lighting†project, and vigorously promoted fluorescent lamps that use energy-saving technologies, namely energy-saving lamps.
However, harmful elements such as mercury contained in energy-saving lamps cause serious pollution to the environment. It is understood that every 1 milligram of mercury can contaminate 360 ​​tons of water. At present, the energy consumption of each energy-saving lamp is about 3~5 mg, and as of 2011, the number of energy-saving lamps accumulated by China through financial subsidies is more than 500 million. As China's current recycling system is still not perfect, if the hundreds of millions of energy-saving lamps are improperly disposed, the pollution consequences will be quite scary.
According to Tang Aijun, deputy secretary-general of China Recycling Resources Recycling Association, energy-saving lamps can only reduce the mercury content, and it is impossible to completely eliminate mercury.
Gao Ming also told reporters that in the past few decades, the lighting industry has done a lot of research and found that the luminescence of mercury atoms is very efficient. So far, no elements that can completely replace mercury atoms in gas discharge lamps have been seen. .
In contrast, LED lights have an environmental advantage. Gao Ming told reporters that LED lamps do not contain mercury, and the recycling of circuit boards is easier than energy-saving lamps, so the environmental pollution is much smaller than energy-saving lamps.
Replacement still has difficulty
Although there are many advantages in terms of energy saving and environmental protection, it is not easy for LED lights to replace other lighting products.
Liu Shiping, vice chairman of the China Lighting Society, told reporters that LED lights are a promising new light source. They are currently in a period of rapid development, but some technologies are still not perfect, such as luminous efficiency, heat dissipation, and driving. The illumination angle is generally only 180 degrees, which is lacking compared with the 360-degree illumination of traditional incandescent lamps and energy-saving lamps.
The imperfections of these technologies also constrain the application of LED lights. For example, some cities are currently questioning the promotion of LED street lights. Relevant experts pointed out that the country has strict regulations on the degree of contrast, uniformity and glare in urban road lighting design standards, but LED products that are currently popularized in the field of public lighting do not meet these standards. In addition, the LED lamp has a high color temperature, is pure white light, and has poor penetrability, especially in rainy and foggy weather, which is not conducive to road safety.
In addition to technical issues, cost issues are also one of the barriers to the popularity of LED lights. Liu Shiping told reporters that the incandescent lamps currently used are generally 1~2 yuan, the energy-saving lamps are 8~9 yuan, and the LED lights are cheaper than forty-five yuan, and the expensive ones are more than one hundred yuan.
However, according to Gao Ming, the cost of LED lights has dropped very fast in the past few years, basically falling at a rate of 20% per year, and this decline will continue in the next few years. In Gao Ming's view, when the price of LED lights drops to about 10 times that of traditional incandescent lamps, it can reflect its competitive advantage.
"The service life of LED lights is more than 20 times that of incandescent lamps. If the price of LED lamps can drop to about 10 times that of incandescent lamps in the future, consumers will invest a little higher in the early stage, but from the perspective of the entire product life cycle, LED lights can save. More than 80% of energy, low maintenance costs, it will become a more economical choice for consumers." Gao Ming said.
In terms of technology, LED lighting has also made new progress. For example, the problem of LED lighting angle. Gao Ming told reporters that if the spatial distribution is taken into account in product design, and the technical input is made at the same time, the spatial distribution of illumination can be made larger. According to Gao Ming, GE's previous A19 LED lamp that meets the requirements of the US Energy Star adopts the design pattern of "octopus", which not only helps to dissipate heat, but also makes the illumination angle larger. In addition, GE also uses related coating technology in the LED bulb to produce diffuse reflection, which makes the illumination angle wider and the light softer.
Development needs caution
Although there are still technical and cost issues that need to be further resolved, it has become a general trend to replace previous lighting products with LED lights. Countries such as Europe and the United States have also promoted the application of LED lights. Our country has also introduced relevant policies to phase out incandescent lamps and encourage the development of semiconductor lighting products.
However, similar to other high-tech industries, the development of LED lighting in China also has the problem of lack of core technology. Liu Shiping admitted to the reporter that at present, the gap between China's LED lighting and foreign countries is mainly upstream, and chip technology, packaging and epitaxial wafer technology are all backward. "More than half of the high-power LED chips used for lighting need to be imported, and most of the domestically produced chips are low-power chips." Liu Shiping said.
On the other hand, China has its own advantages in the development of LED lighting. Such as the advantages in raw materials and labor costs, as well as the country's strong support at the policy level. It is understood that at present, China has built more than a dozen industrialization bases, and LED street lights are also being vigorously promoted.
The rapid development of LED lighting is also a concern. He Zaihua, a senior researcher at China Investment Consulting, said that although China's LED lighting demand has great potential and there are strong government policies, there are also problems such as lax supervision, uneven product quality and high production costs. In addition, the problem of product homogenization is serious, the core technology needs to be strengthened, and the market competition mechanism is not perfect, which also plagues the development of LED lighting in China. These have to be gradually resolved in the future development.
(This article is reproduced on the Internet. The texts and opinions expressed in this article have not been confirmed by this site, nor do they represent the position of Gaogong LED. Readers need to verify the relevant content by themselves.) 
The relevant person in charge of the National Development and Reform Commission revealed that it will speed up the formulation of a special plan for the “12th Five-Year†semiconductor lighting energy-saving industry. In addition, it will speed up the application of engineering and promote financial lighting products to promote semiconductor lighting products and increase market share. LED lighting is welcoming a good time for development.