The street lamp is the patron saint of the city at night, and the good street lamp design bears three important tasks: First, uniform and comfortable lighting, so that drivers, pedestrians can see the road conditions; Second, provide safe lighting, sidewalks, city corners do not stay "dark "Face" to reduce nightly security incidents; Third, to achieve energy-efficient lighting, it is necessary to do a good job, but also according to cheap. The cost and energy consumption of road lighting are very large. How to ensure more energy-saving and environmental protection is an increasingly important issue in ensuring the quality and safety of road lighting. Recently, people's congress deputies in Guangzhou pointed out that the existence of LED street lights, "power saving does not save money" and other issues, it is recommended to slow down the pace of replacement.
The hidden danger of the street lights The blue light outside the Pazhou Complex jeopardizes the safety of the Pazhou Complex in the night. A blue light band outlines the contours of its undulations, and it stretches across the Yuejiang Road until it reaches the shore of the Pearl River. From a distance, this blue arc is beautiful. Dreamy, but it is a blue nightmare for Ms. Jiang, the citizen who drives through here every night.
Ms. Jiang lives in a cart and works in Kecun. She often works overtime. She often drives home in the night along the Yuejiang Road outside the Pazhou Complex. “Every distance is a few hundred meters and I start to see this blue block on the road. It's much brighter than the lights on and around the road. The glare of blue light allows people to block their eyes with a sun visor or even “close their eyes†when they drive past. Otherwise, they wouldn’t open their eyes. If there was a roadblock or a pedestrian passing by, it would be In a traffic accident, it was a bit better recently, with a white light, not so "bitter blue", but it was even brighter. When the car passed directly under the band of light, the strong light hit the front glass directly. I can't see the road, I'm afraid of an accident."
Ms. Jiang’s encounter is typical of “glare†(refers to the unsuitable brightness distribution in the field of vision, or extreme brightness contrast in space or time, resulting in visual discomfort and the sensation of light that the human eye cannot adapt to). Lighting affects road lighting. Lighting expert Liu Diqiang said. The purpose of road lighting is to enable the driver to recognize the condition of the road in front and ensure night driving safety and comfortable driving. Qualified road lighting must take into account the driver's visual requirements so that the driver can quickly and accurately obtain relevant road traffic information.
Regarding the influence of the Pazhou Guild Hall Light Belt, the reporter interviewed Xie Director-General of the Urban Environment Construction Department of the Municipal Construction Commission. He said that he was planning to make adjustments to the bright projects on both sides of the Pearl River, including the Pazhou Complex. “We will make the opinions of the public. Adjustment."
The road sections of Huanshi Road and other trees are difficult to see. “In fact, the road is not as bright as possible, but even more important is uniform illumination and no “zebra crossing.†Zheng Yaqin, chief operating officer of Guangzhou Guangya Network Technology Co., Ltd. said.
One of the main roads in Guangzhou is very uneven in streetlights. At 9:00 pm on Monday, the reporter saw the section of the Garden Hotel on Huanshi Road. As the trees were lush and the street lights were low, many of the street lights were "buried" in the canopy. The roads that were not blocked by trees were bright, but they were close to the shade of the sidewalks. The next road is dark.
Mr. Wang, who drove, told reporters that he was driving at Huanshi Road at night. He was most afraid of the passers-by who had a taxi. “Some people went to fight on the road and stood under the shade of trees. Before darkness, they could see people. The driver of the taxi driving near the Huaguoshan road section of Huanshi Road told reporters that he was most afraid of encountering black people in the evening. "If the street lighting is not enough, if they just wear darker clothes, it's really Can not see people, unless they smiled and showed white teeth, let the driver wake up there was a taxi.†Guangzhou, due to the evergreen trees of the four seasons, leaves blocked, and even the street lights are “wrappedâ€, “buried†The situation can be seen everywhere, affecting the lighting effects of many road sections.
Zheng Yaqin suggested that the garden department and the street lamp should fully coordinate, on the one hand, to timely prune the roadside lighting, overly dense branches and branches, on the other hand, consider increasing the height of the street lamp, or adding a small lamp under the street lamp to avoid the tree crown. Occlusion.
Suggest Dongfeng Road China Lights Reflector Angle Last year, Dongfeng Road replaced a new 400-inch Zhonghua lamp with 10 lamps per lamp. A closer look will reveal that the light shining into the sky is more than the light toward the road, not only wasting but also forming light pollution. It is difficult to see the stars in Guangzhou, let alone the beautiful starry sky such as the Milky Way. One of the reasons is that too much light hitting the sky causes light pollution. Therefore, the lighting industry at present emphasizes that light should not be directed at the sky.
According to Liu Diqiang, a lighting expert, there is a reflector in each lamp of the Chinese lamp, reflecting the effect of light. He suggested adjusting the angle of the reflector to make more light shining toward the ground.
The tunnel lighting should avoid the strong visual difference. In the construction of the roads in Guangzhou, there are more and more tunnels, and the taxi driver Lin feels, “Some tunnels are too bright. When you enter at night, you feel that you are in front of your eyes. black."
Many tunnel lights have a "zebra crossing" effect, and the area between the two street lights turns black. For example, in front of the beer museum on Yuejiang Road, there is a sand-shave tunnel in the middle of the street. The middle section of the beer museum is easy to be visually fatigued.
The chief editor of the professional lighting magazine “Aladdin†and Li Ping introduced that the tunnel is a special section of the road. The brightness of the tunnel changes greatly with the passage of time. When the vehicle enters, passes through, and exits the tunnel, it will produce a Series of visual problems.
If the tunnel is short, the brightness outside the exit can be seen from the entrance is very high, forming a strong visual difference, known as the "black box effect", at this time the driver's brightness of the tunnel exit is more difficult to adapt; if the tunnel is longer, when the vehicle When I first entered the tunnel, I would feel that the exit was dark, I could not even recognize the condition near the exit, known as the “black hole effectâ€, and the vehicle was driving in the long tunnel for a while, approaching the tunnel exit, due to the exit light and the darkness inside the tunnel. The formation of a strong visual difference will see a dazzling "white hole" called the "white hole effect." The "black hole" and "white hole" effects in the long tunnel are easy for drivers to produce discrepancies in the judgment due to visual light differences and even affect driving safety. If the lighting within the tunnel is adjusted properly, these visual differences can be mitigated and eliminated.
Is it time to change LED lights?
In addition to ensuring road safety, LED lights do not save energy. In recent years, the “energy saving†requirements have been vigorously promoted. In early 2009, in order to expand domestic demand, promote the development of China's LED industry, and reduce energy consumption, the Ministry of Science and Technology of China launched the “Ten City Million†semiconductor lighting application model city program, covering 21 domestic developments in Beijing, Shanghai, Shenzhen, and Wuhan. The city plans to install millions of LED street lights within three years. In January 2010, according to a Guangzhou Daily report, Guangzhou has announced that it will invest 25 billion yuan to promote LED street lamps within three years. According to Quan Jian, president of the Guangdong Provincial Lighting Association, before the Asian Games, Guangzhou has converted 50,000 street lamps to LED street lamps, and will replace 110,000 LED street lamps by the end of this year.
LED street lamps save electricity costs less than installation and maintenance costs. LED street lamps have high costs and maintenance is a fact recognized by the lighting industry. "At present, an LED lamp head is at least 4,000 yuan, and the poles, chips, etc. are at least 2000 yuan." According to Zheng Yaqin, who is in the lighting industry, "LED streetlights are expensive to maintain. Because there is no uniform LED lamp standard, manufacturers will produce their own products, and the replacement will be very fast. Some LED lamp heads are broken, and they are looking for manufacturers to change. Manufacturers said that I would not have produced this model any longer and had to replace the lamp post together."
Although LED and other power-saving, it does not save money. It is understood that the power consumption of LED street lamps is 1/5 to 1/7 of the current street lamps. According to Quan Jian, president of the Guangdong Provincial Lighting Association, China's LED technology is currently not mature enough, although theoretically the lifespan of LED lamps should be more than ten years, and in fact it is not achieved. Therefore, updating maintenance costs is expensive.
In fact, only a few cities in the 21 cities covered by the Ministry of Science and Technology of China’s Ministry of Science and Technology proposed a clear installation plan. At the end of last year, Kunming City even said “NO†to LED lights and refused to install them. Kunming Power Supply Bureau calculated an account, think that the LED lights save less than the installation and maintenance costs.
Change LED lights should be careful Xin Ren, deputy representative of Guangdong Provincial People's Congress believes that in the same intensity of lighting, LED lights are actually not more energy-efficient than high-pressure sodium lamps. At present, this technology is still in an exploratory stage all over the world. After trials in some cities in the north, the use of LED lights has been gradually reduced. Guangzhou can't promote it blindly on a large scale. Replacement of LED lights should be prudent.
Under the condition that LED technology is not mature, should Guangzhou suspend the pace of LED replacement? Quan Jian said that this is also part of the views of experts and scholars, LED is the direction of future development, the government should support, and the government's support has also had significant results in recent years, LED technology has made great progress, compared with 2008, LED lights The lighting effect has increased from 60 watts to 100 watts, and the chip price has also dropped from 10 yuan to one or two yuan. In time, LED lighting technology is more mature, lighting energy-saving effect is more obvious, the cost and maintenance of lower prices, then large-scale promotion of replacement of LED lights will be more economic benefits.
The hidden danger of the street lights The blue light outside the Pazhou Complex jeopardizes the safety of the Pazhou Complex in the night. A blue light band outlines the contours of its undulations, and it stretches across the Yuejiang Road until it reaches the shore of the Pearl River. From a distance, this blue arc is beautiful. Dreamy, but it is a blue nightmare for Ms. Jiang, the citizen who drives through here every night.
Ms. Jiang lives in a cart and works in Kecun. She often works overtime. She often drives home in the night along the Yuejiang Road outside the Pazhou Complex. “Every distance is a few hundred meters and I start to see this blue block on the road. It's much brighter than the lights on and around the road. The glare of blue light allows people to block their eyes with a sun visor or even “close their eyes†when they drive past. Otherwise, they wouldn’t open their eyes. If there was a roadblock or a pedestrian passing by, it would be In a traffic accident, it was a bit better recently, with a white light, not so "bitter blue", but it was even brighter. When the car passed directly under the band of light, the strong light hit the front glass directly. I can't see the road, I'm afraid of an accident."
Ms. Jiang’s encounter is typical of “glare†(refers to the unsuitable brightness distribution in the field of vision, or extreme brightness contrast in space or time, resulting in visual discomfort and the sensation of light that the human eye cannot adapt to). Lighting affects road lighting. Lighting expert Liu Diqiang said. The purpose of road lighting is to enable the driver to recognize the condition of the road in front and ensure night driving safety and comfortable driving. Qualified road lighting must take into account the driver's visual requirements so that the driver can quickly and accurately obtain relevant road traffic information.
Regarding the influence of the Pazhou Guild Hall Light Belt, the reporter interviewed Xie Director-General of the Urban Environment Construction Department of the Municipal Construction Commission. He said that he was planning to make adjustments to the bright projects on both sides of the Pearl River, including the Pazhou Complex. “We will make the opinions of the public. Adjustment."
The road sections of Huanshi Road and other trees are difficult to see. “In fact, the road is not as bright as possible, but even more important is uniform illumination and no “zebra crossing.†Zheng Yaqin, chief operating officer of Guangzhou Guangya Network Technology Co., Ltd. said.
One of the main roads in Guangzhou is very uneven in streetlights. At 9:00 pm on Monday, the reporter saw the section of the Garden Hotel on Huanshi Road. As the trees were lush and the street lights were low, many of the street lights were "buried" in the canopy. The roads that were not blocked by trees were bright, but they were close to the shade of the sidewalks. The next road is dark.
Mr. Wang, who drove, told reporters that he was driving at Huanshi Road at night. He was most afraid of the passers-by who had a taxi. “Some people went to fight on the road and stood under the shade of trees. Before darkness, they could see people. The driver of the taxi driving near the Huaguoshan road section of Huanshi Road told reporters that he was most afraid of encountering black people in the evening. "If the street lighting is not enough, if they just wear darker clothes, it's really Can not see people, unless they smiled and showed white teeth, let the driver wake up there was a taxi.†Guangzhou, due to the evergreen trees of the four seasons, leaves blocked, and even the street lights are “wrappedâ€, “buried†The situation can be seen everywhere, affecting the lighting effects of many road sections.
Zheng Yaqin suggested that the garden department and the street lamp should fully coordinate, on the one hand, to timely prune the roadside lighting, overly dense branches and branches, on the other hand, consider increasing the height of the street lamp, or adding a small lamp under the street lamp to avoid the tree crown. Occlusion.
Suggest Dongfeng Road China Lights Reflector Angle Last year, Dongfeng Road replaced a new 400-inch Zhonghua lamp with 10 lamps per lamp. A closer look will reveal that the light shining into the sky is more than the light toward the road, not only wasting but also forming light pollution. It is difficult to see the stars in Guangzhou, let alone the beautiful starry sky such as the Milky Way. One of the reasons is that too much light hitting the sky causes light pollution. Therefore, the lighting industry at present emphasizes that light should not be directed at the sky.
According to Liu Diqiang, a lighting expert, there is a reflector in each lamp of the Chinese lamp, reflecting the effect of light. He suggested adjusting the angle of the reflector to make more light shining toward the ground.
The tunnel lighting should avoid the strong visual difference. In the construction of the roads in Guangzhou, there are more and more tunnels, and the taxi driver Lin feels, “Some tunnels are too bright. When you enter at night, you feel that you are in front of your eyes. black."
Many tunnel lights have a "zebra crossing" effect, and the area between the two street lights turns black. For example, in front of the beer museum on Yuejiang Road, there is a sand-shave tunnel in the middle of the street. The middle section of the beer museum is easy to be visually fatigued.
The chief editor of the professional lighting magazine “Aladdin†and Li Ping introduced that the tunnel is a special section of the road. The brightness of the tunnel changes greatly with the passage of time. When the vehicle enters, passes through, and exits the tunnel, it will produce a Series of visual problems.
If the tunnel is short, the brightness outside the exit can be seen from the entrance is very high, forming a strong visual difference, known as the "black box effect", at this time the driver's brightness of the tunnel exit is more difficult to adapt; if the tunnel is longer, when the vehicle When I first entered the tunnel, I would feel that the exit was dark, I could not even recognize the condition near the exit, known as the “black hole effectâ€, and the vehicle was driving in the long tunnel for a while, approaching the tunnel exit, due to the exit light and the darkness inside the tunnel. The formation of a strong visual difference will see a dazzling "white hole" called the "white hole effect." The "black hole" and "white hole" effects in the long tunnel are easy for drivers to produce discrepancies in the judgment due to visual light differences and even affect driving safety. If the lighting within the tunnel is adjusted properly, these visual differences can be mitigated and eliminated.
Is it time to change LED lights?
In addition to ensuring road safety, LED lights do not save energy. In recent years, the “energy saving†requirements have been vigorously promoted. In early 2009, in order to expand domestic demand, promote the development of China's LED industry, and reduce energy consumption, the Ministry of Science and Technology of China launched the “Ten City Million†semiconductor lighting application model city program, covering 21 domestic developments in Beijing, Shanghai, Shenzhen, and Wuhan. The city plans to install millions of LED street lights within three years. In January 2010, according to a Guangzhou Daily report, Guangzhou has announced that it will invest 25 billion yuan to promote LED street lamps within three years. According to Quan Jian, president of the Guangdong Provincial Lighting Association, before the Asian Games, Guangzhou has converted 50,000 street lamps to LED street lamps, and will replace 110,000 LED street lamps by the end of this year.
LED street lamps save electricity costs less than installation and maintenance costs. LED street lamps have high costs and maintenance is a fact recognized by the lighting industry. "At present, an LED lamp head is at least 4,000 yuan, and the poles, chips, etc. are at least 2000 yuan." According to Zheng Yaqin, who is in the lighting industry, "LED streetlights are expensive to maintain. Because there is no uniform LED lamp standard, manufacturers will produce their own products, and the replacement will be very fast. Some LED lamp heads are broken, and they are looking for manufacturers to change. Manufacturers said that I would not have produced this model any longer and had to replace the lamp post together."
Although LED and other power-saving, it does not save money. It is understood that the power consumption of LED street lamps is 1/5 to 1/7 of the current street lamps. According to Quan Jian, president of the Guangdong Provincial Lighting Association, China's LED technology is currently not mature enough, although theoretically the lifespan of LED lamps should be more than ten years, and in fact it is not achieved. Therefore, updating maintenance costs is expensive.
In fact, only a few cities in the 21 cities covered by the Ministry of Science and Technology of China’s Ministry of Science and Technology proposed a clear installation plan. At the end of last year, Kunming City even said “NO†to LED lights and refused to install them. Kunming Power Supply Bureau calculated an account, think that the LED lights save less than the installation and maintenance costs.
Change LED lights should be careful Xin Ren, deputy representative of Guangdong Provincial People's Congress believes that in the same intensity of lighting, LED lights are actually not more energy-efficient than high-pressure sodium lamps. At present, this technology is still in an exploratory stage all over the world. After trials in some cities in the north, the use of LED lights has been gradually reduced. Guangzhou can't promote it blindly on a large scale. Replacement of LED lights should be prudent.
Under the condition that LED technology is not mature, should Guangzhou suspend the pace of LED replacement? Quan Jian said that this is also part of the views of experts and scholars, LED is the direction of future development, the government should support, and the government's support has also had significant results in recent years, LED technology has made great progress, compared with 2008, LED lights The lighting effect has increased from 60 watts to 100 watts, and the chip price has also dropped from 10 yuan to one or two yuan. In time, LED lighting technology is more mature, lighting energy-saving effect is more obvious, the cost and maintenance of lower prices, then large-scale promotion of replacement of LED lights will be more economic benefits.
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