LED lighting industry in China is entering the independent innovation of great historical opportunity to achieve leapfrog development, expanding the application of LED lights, LED lights in the application in practice did have some problems, the country became the testing ground of the LED lights. part of the scientific and technological content, low-level redundant construction, LED street light application there are some problems to be solved.
(1) high price
The cost of LED lights is much higher than the high-pressure sodium lamp, a led driver 120w light price in 3000 ~ 5000 yuan, or even higher, while the price of an import brand high pressure sodium lamps (including lighting, electrical equipment, light) not more than 1500 yuan. Their current state, LED lights was too expensive, the price is 2-5 times of high pressure sodium lamp. Therefore, even if the power consumption of the LED lights only half of the high-pressure sodium lamp, but due to much higher prices than the high-pressure sodium lamp, with LED lights instead of the high-pressure sodium lamps cost recovery cycle is still very long.
Therefore, LED lights in the road lighting market, promotion, price and cost remains the biggest obstacle. To make the LED street lamp fell to the competitive prices, with the existing lamps manufacturers cost drop. Recently only in the LED Floodlight 80W technology continues to mature, and continuously improve the luminous efficiency under the premise of life advantages of LED's, energy-saving advantages to compensate for disadvantage on the lamp price.
Two domestic light source can not meet market demand
The development of domestic LED light source is relatively foreign to a late start, the technical level there is a certain distance from the international leader. At present, the luminous efficiency of Cree, Nichia, Europe OSRAM light source of imports generally exceeds 100lm / W Although China has been invested heavily in the development of the LED light source technology, the skill levels are rising, but the luminous efficiency is 30lm / W to 60lm / W and then to 100lm / W, the course of development, in terms of 'quality' and 'amount' domestic LED Flood light 10W source far from being able to meet market demand.
Domestic LED Power Supply source PN junction in the room temperature work, although the theoretical life of 100,000 hours, but due to the heat problem can not be completely effective solution, making it the actual life of discount LED lights light failure (life) has also become restricting its one of the key issues are widely used in street lamps. The life of the LED lights no experience with the use of domestic LED light source manufacturers known as the life of 60,000 hours, but no actual use of data or laboratory test data to support the practical application of the process, some manufacturers products due to the light fades, the short period of time there have been a large number of 'dead light' phenomenon caused serious damage to the reputation of LED lights.
(3) power system instability
The LED driver power supply instability is the industry consensus, in fact it is holding the LED Spotlight 30W lighting industry hind legs, because the drive power is an important component of the LED street lamp, its failure will result in the failure of the entire lamp. Due to the harsh environment of outdoor work, including the life of the power part components become the bottleneck of the life of drive power and even the entire street lights.
Lead to installation of street lights is likely in a short period of time, bad power supply and poor reliability for LED street outdoor height device, installation and maintenance more difficult to lamp manufacturers in terms of unstable power supply makes the cost of maintenance rising. Therefore, the power LED street lamp driver power quality, but off a short board to hinder the development of high power LED street lights.