Not only wastes electricity but also causes light pollution. Experts recommend reducing brightness and using less air cannons, laser lights, etc.
In the urban area of ​​Chongqing, the landscape lighting of many buildings has exceeded the standard, and light pollution has become a major public hazard. At the “Urban Lighting Energy Saving and Consumption Reduction†forum held by the municipal government yesterday, experts called on the city to strictly implement the “Urban Lighting Landscape Standardsâ€. While highlighting the “Mountain City Night Sceneâ€, don’t waste electricity.
The brightness of landscape lighting is generally exceeding the standard
Yang Chunyu of the School of Architecture and Urban Planning of Chongqing University participated in the formulation of the "Chengqing City Night Lighting Specification". He said in the keynote speech that the night scene lighting has bright and dark colors, and it has a layer and beauty. According to the night lighting technical specifications of the city, the maximum illumination brightness of the main city center commercial area is no more than 25cd/m2, the central general area is 10cd/m2, and the urban-rural junction is 2.5cd/m2. Cd/m2 is a professional international unit of brightness level. This brightness standard set by Chongqing is similar to the national standard. It meets the requirements of energy saving and makes people feel visually comfortable.
“We recently took a landmark building in Chongqing as an example and found that its landscape lighting exceeded the standard by 2.6 times.†He said that this is a building that uses energy-saving LEDs as a light source, and other light source buildings are even more difficult. In Chongqing metropolitan area, the night lighting is increased by 1 cd/m2, which consumes 1.67 million kWh per year. “The visual difference of 1 cd/m2 is not large, but the more the standard exceeds the more electricity, the more visually there is no beauty.â€
Reduce brightness to prevent "artificial white"
Chen Dahua, deputy secretary-general of the China Lighting Society and professor of Fudan University, said that he participated in the planning and design of the Shanghai Bund night scene. The Bund reduced the brightness of the lighting three times during the landscape lighting design to achieve harmony with the environment. People think that the Bund is bleak." He believes that the night scene in Chongqing is similar to the Bund, and it is also possible to consider reducing the brightness.
Professor Yang Chunyu said that the brightest brightness of night landscape lighting can't exceed 20 times of ambient brightness. The light pollution and energy consumption of high-power night lights such as air cannons and laser lights are very serious and should be used sparingly.
It is understood that although the city's night lighting technical specifications have been formulated, in practice, there is no restrictive measure for excessive landscape lighting. Experts have called for the landscape lighting of buildings to eliminate the "climbing" mentality. Before the construction, it is necessary to carry out examination and approval, and specific punishment measures are required for exceeding the standard.
Instance
Spotlights affect the rest
Complaint handling difficulties
Residents of Kuixinglou complained that the spotlights in Linjiang and the floodlights in the building made them feel very uncomfortable. In the evening, half a minute, a light beam hit and just shot into the window, affecting the rest. It is understood that China currently has no restrictions on light pollution, and it is still impossible to rely on light pollution. The handling of such complaints is very difficult.
Suggest
Outstanding sign architectural brightness
Weaken ordinary building lighting
Zhang Xiaoqing, chairman of the Overseas Chinese Federation of Chongqing Education College, called this newspaper yesterday to suggest that the city should weaken the landmarks such as the Great Hall of the People, Jiefangbei, Chaotianmen Wharf, Binjiang Road, Yishu, Dajinying and other landmarks. Lighting in general and ordinary buildings in urban areas.
Editor: China Lighting Network Feng Yaoyuan
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