Three Problems in the Application of LED Street Lamps

At present, China's LED lighting industry is entering a period of major historical opportunities for independent innovation and achieving leap-forward development. The application of LED street lamps continues to expand, but LED street lamps do encounter some problems in the application practice. The country has become a testing ground for LED street lamps. Some products have no scientific and technological content, low-level repeated construction, there are some problems in the application of LED street lamps to be resolved.

High prices

At present, the cost of LED street lamps is much higher than that of high-pressure sodium lamps. The price of an LED street lamp is between 3,000 and 5,000 yuan, and even higher, while the price of a set of imported high-pressure sodium lamps (including lamps, complete sets of electrical lighting sources) 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 2 to 5 times that of high pressure sodium lamps. Therefore, even if the power consumption of the LED street light is only one half 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 light will still be very long.

Therefore, LED street lamps must be officially promoted in the road lighting market, and the price and cost are still the biggest obstacles. To make the LED street lamp down to the competitive price with the existing lamp, the cost of each manufacturer needs to be reduced. In the near future, only under the premise of continuous maturity of LED technology and continuous improvement of luminous efficiency, LED's longevity advantage and energy saving advantage can be used to make up for the disadvantages of the price of lamps and lanterns.

2. Domestic light source can not meet market demand

The development of domestic LED light source is relatively late to start overseas, and there is still a certain distance between the technology level and the international leading players. At present, the luminous efficiency of imported light sources such as Cree, Japan, and Osram is generally more than 100lm/W. Although China has continuously invested heavily in the development of LED light source technology, and the level of technology has also been continuously improved, but the light efficiency is still in the development process from 30lm/W to 60lm/W to 100lm/W, both in terms of “quality” and “quantity”. On the domestic LED light source can not meet the market demand.

Domestic LED light source PN junction work at room temperature, although the theoretical life can reach 100,000 hours, but due to heat problems can not be completely resolved, so that its actual life is greatly reduced, LED street light failure (life) has become a problem One of the key issues that restricts its widespread use in street lamps. At present, the service life of LED street lamps has no experience at the moment, and many manufacturers that use domestic LED light sources claim that the life span can reach 5 to 60,000 hours, but there is no actual application of data or laboratory test data to support. In the actual application process, some manufacturers Due to the large light decay, a large number of “dead light” phenomenon appeared in a short time, which caused serious damage to the reputation of LED street lamps.

3. The power system is unstable

LED drive power instability is the industry consensus, in fact it is dragging the LED lighting industry, because the driving power is an important part of the LED street light, its failure will lead to the failure of the entire light. Due to the harsh environment of outdoor work, the life of some of the components of the power supply becomes the bottleneck of the life of the driving power supply or even the entire street lamp.

The poor reliability of the power supply may cause the installed street light to be broken in a short time. This is difficult to install and maintain for LED outdoor lights such as outdoor lights. For the street light manufacturers, the unstable power supply makes maintenance costs. Climb high. Therefore, the quality of the high-power LED street lamp driving power, however, becomes a shortcoming that hinders the development of high-power LED street lamps.