Industry survey: explore the truth behind the LED lights

The day before it was reported that the Jiangsu city of Nanjing province two years ago, a section of the 170 pilot LED lights all too bad, life does not meet expectations, and the energy saving effect is not obvious.

In recent years, many Chinese departments and local governments in the promotion of LED lighting. In the large sums of money to promote the promotion of LED lighting occasion, which areas of mature technology is worth promoting the problem of the LED street lamp is used to see whether the effect of the promotion of LED lights, which problems need to be resolved?

Question 1: Nanjing pilot LED street lamp why not up to expectations?

[survey] immature driving technology affects life; energy saving is not as high as sodium lamp, the price is two times higher.

Due to the advantages of LED lighting with energy saving and environmental protection, not in the Ministry of science and technology organization of the Ten City million lighting project listed in Nanjing, in recent years also conducted a pilot LED street.

About LED street was exposed sections of the Nanjing City Urban Management Bureau Street Office Deputy Chief Engineer Liu Leishi introduced, "at that time from dozens of brands, choose a quality and price are in the medium level of Taiwan funded enterprises LED lamps, each lamp price is 6000 yuan. Manufacturers warranty 5 years, that a batch of LED street lamp because of the drive, that is, the technology is still immature inverter rectifier, the use of electrolytic capacitors and other components of the service life, only one to two years. "

So, the road section of the LED street lamp energy saving effect? Liu Leishi introduction, in 2010, Nanjing Jiefang Road LED street lamp lighting effect for 70 - 80 lumens / watt, a $6000, and usually use the high pressure sodium lamp light effect of about 90 lumens / watt, a $2000. From the point of view of the situation, LED street price is not high. However, with the progress of technology, the current price of LED street lamp has dropped by nearly half.

On LED street, Nanjing is not the same time than other cities pilot effect is poor, can only be said to be in accordance with the technical standards at that time, the LED lamp will not replace the high-pressure sodium lamp. Liu Leishi said.

Question two: LED lamp how to use?

[survey] landscape lighting and interior lighting LED lamp technology is more mature

LED lighting (lighting) refers to the use of light-emitting diode (light emitting diode) as the lighting source, known as the third revolution of light source, has the characteristics of energy saving, environmental protection, long life, rich colors, shock resistance etc.. Its application field is very wide, as the first indicator and signal lights, and now widely used in landscape lighting, car lights, backlight, general lighting and other fields. The general lighting can be divided into indoor lighting (office, home, shopping malls, hotels, etc.) and outdoor lighting (roads, squares, tunnels, etc.). In theory, the LED luminous efficiency of 120 LM / W, the future can reach 250 LM / W, much higher than the two generation light source; the light source life for 50 thousand hours, the service life of the lamp to reach 25 thousand - 30 thousand hours, the equivalent of the first generation light source (such as incandescent lamps) 25 times, the second generation light source (such as fluorescent lamps, household energy saving lamp, high pressure sodium) about 5 times.

In the field of general lighting, which type of LED lamp technology development is more mature? Deputy Secretary General of alliance national semiconductor lighting project general Geng Bo introduction, LED lighting is a small power developed, relatively LED lamp (100 watts or more) high-power LED lamp lighting, indoor household, commercial (30 watts), the technology is relatively more mature, suitable for promotion. But the indoor LED lighting qualified products to at least 40 yuan / lamp, higher than fluorescent energy-saving lamps. Countries should increase subsidies to promote universal.

Nanjing Urban Management Bureau inspector Li Yiwu said that in Nanjing, about 85% of the landscape lighting for LED lights. "LED can be directly achieved color lighting, coupled with landscape lighting is generally small lights, technology has matured, with a wide range of. The street lighting is generally high power lamps, technology integration is difficult. "

The deputy director of the Nanjing Institute of lighting Yang Haifeng calculations: the ordinary 35 watt lamp to do comparison, 4.2 watt LED lamps can achieve the same lighting effect, assuming the work 5 hours a day, a year can save 56.2 of electricity, electricity to 0.8 yuan as an example, you can save 44.96 yuan.

Deputy Secretary of alliance national semiconductor lighting project, general Ruan Jun said, many countries have been promoting the LED lighting lamps, such as South Korea proposed to achieve the 30% at the end of 2012 for the LED to promote LED lighting lamps; the United States through all state power company subsidies. But with the mainland to promote LED street lamp is different, in developed countries, high consumption capacity, the domestic lighting market is developing fast; and road infrastructure construction has been completed, the municipal procurement to be less.

Question three: LED street lamp is suitable for promotion?

[survey] do not grasp the high-end technology, the price is too expensive; lack of testing standards, uneven quality

About LED street, an industry source said, the situation is not optimistic, China LED high power integrated technology is not very mature, the impact of lighting effects; LED is different from other sources, "afraid of hot, if the cooling system is not perfect, will lead to the decay of the lighting effect is poor, life will be shortened. In addition, the number of chips is the key factor affecting the luminous effect of LED street lamp, but the high-end technology of LED street lamp in foreign countries, the use of high cost. At present, the mainland LED lamp chip about 80% of imports; indoor LED lamp chip localization rate is slightly higher.

China Institute of Metrology optical and laser metrology Science Institute Dr. Zhao Weiqiang introduction, the mainland's LED chip production technology has been in progress, to achieve the support of high-power lighting, but the high-end streetlights