80 thousand power saving LED street lights will illuminate some of the drivers in Shanghai reflect not adapt

According to reports, according to a recently published "Shanghai City 12th Five-Year" semiconductor lighting industry development plan (approved draft) ", aims at" 12th Five-Year "period, Shanghai will present 400 thousand street lights in two about 80 thousand into LED street lamp.

This plan had been introduced aroused controversy: the advantages of the LED lamp is energy saving, long service life, good color, but also part of the view that, LED lighting technology is not perfect, so that some drivers may feel uncomfortable, and even produce visual fatigue. In this regard, there are lighting experts said that if the distribution of light technology to do a good job, LED street lights can avoid these problems, so that the driver feel more comfortable.

Street lamps into the 12th Five-Year plan

Recently announced the Shanghai 12th Five-Year semiconductor lighting industry development plan (Draft), revealed that, in accordance with the six ministries jointly issued a document, in 12th Five-Year, the LED functional lighting market share must reach up to 20%. According to this calculation, the current 400 thousand street lamps in Shanghai, there will be a need to transform the 80 thousand lights LED.

Lighting optical experts, Shanghai semiconductor lighting Engineering Research Center Engineering Manager Yang Jiexiang said, compared to the traditional street lamp, LED street lamp has excellent energy-saving features. Now use the power lamp generally can be divided into 250 watts, 400 watts and 1000 watts of three. To 250 Watt street lamps, for example, the actual exposure to the surface of the road on the luminous flux of about 14000 lumens, but the brightness of a lamp can reach a 150 Watt LED. At the same time, it is difficult to achieve the traditional dimming function, it is easy to reduce the life of lamps, LED lights do not have this concern. In addition, LED street lamp in reducing the original color of the color rendering is also good, the effect of the original object to restore the color of the sun is best. In the clear weather, the midday sun, if the color is 100, the color of the LED street lamp can reach 70 to 85, while the high-pressure sodium lamp is only between 20 and 40.

Currently, only 2% of the total amount of Shanghai LED street lamp, about six thousand or seven thousand lights, only part of the Yangtze River Tunnel Bridge in the use of LED street lights. Yang Jiexiang said that to achieve this goal, I hope the competent authorities in Shanghai in the next 5 years to actively promote the transformation of the old road, some of the new street lights also want to be directly installed into LED street lamp.

Existing LED street lamp is still defective

The old driver Yao has nearly 20 years of driving experience, rich experience. Reporters aboard at 6 last night he was driving the car, driving the Guangzhong branch road has been installed on LED street. The car just turned to Guangzhong branch, the overall color pavement is changed. "Just the street lights are yellow, the street lights how to send white light? Old Yao tightly steering wheel, and even stepped on the foot brake, will be reduced from 40 kilometers per hour to a distance of 30 km.

A branch is only 200 meters long, the entire road with 7 LED lights. At the same time, the end of the road is also installed in the area of a few LED street lamps, these lamps are fitted with 4 rows of LED light bulbs.

Lao Yao said, in addition to the color of the light, the brightness of the street lamp also let him not adapt. "Obviously you can feel, is directed to the street pavement is very bright, very clear, but the two lights between the road is very dark. If someone comes out of the dark, I might not be able to stop. "In order to prove this, the old Yao with a reporter came to the nearby concentric Road, which is also a small road, but the installation of ordinary street lamps. "The light of the road is softer, but the road is more uniform. "Between the old Yao pointed to the two lights on the ground and said," see here, much more comfortable. In this way, the old Yao driving speed is always maintained at about 40 km.

However, some drivers are not so sensitive. Miss Liu lived near the village almost every day driving through the Guangzhong branch, when a reporter asked her to LED street view, Liu realized the door lamp is not generally. "You don't say I haven't found it yet! Liu Xiaojie said, just above the windshield of the car attached to the gradient of the film color, can not feel the glare. While another has 10 years of driving a taxi driver also said that this road is so short, do not feel uncomfortable out.

Problem solving techniques already available

For the old Yao problems, Yang Jiexiang has been aware of: "most worried about is that LED street just when you start using the driver may be accustomed to the traditional street lamp light and dark yellow are not used, leading to the driving environment is not comfortable. "

According to Yang Jiexiang analysis, the driver said, "not used" should mainly from the color. High pressure sodium lamp light yellow, LED street lamp is white, but the driver can quickly adapt to this point. On the other hand, LED lights can also adjust the color, if necessary, LED street lamp into yellow is not difficult. As for the existence of LED light source glare, zebra effect and other issues, Yang Jiexiang admitted that some products do. "It depends on the quality of the product. With good light technology LED street lamp can improve this point. At present, some manufacturers have introduced a warm white LED street lamp, the color is closer to the high-pressure sodium lamp, Yang Jiexiang said, Shanghai in the promotion of the LED process should be used with light technology good lighting. He said that there are a number of LED street light distribution technology to do quite well, such as the use of LED on the highway in Shenzhen, has basically eliminated the zebra effect".

Zebra effect

According to the Department of environmental science and engineering, Fudan University, Professor Yuan Qiao introduction, LED street lamp is likely to be very bright, but the road between the two lights is relatively dark, which is the LED street lamp"