Light pollution solutions

Light pollution

Light pollution solutions

May 15, 2021
8 mins to read
Ways of prevention and treatment methods to reduce light pollution

1. To reduce light pollution, the key is to strengthen urban planning and management, reasonable arrangement of light sources, strengthen the management of advertising lights and neon lights, prohibit the use of high-powered light sources, control the use of high-powered civilian laser devices, limit the use of reflective coefficient of materials and other measures is imperative.


As a general public, on the one hand, do not stay in the light pollution zone for a long time, if the light is too strong, the room can be installed blinds or double curtains, according to the intensity of light for the corresponding adjustment; on the other hand, all people should do something, plant trees and flowers around the buildings, planting turf to improve and adjust the lighting environment, etc..


2. It is recommended that the state develop technical specifications and corresponding laws and regulations related to light pollution.


Few people in China are still aware of the hazards of light pollution, so there is no unified standard in this area. Experts believe that the rapid development of urban night landscape construction in China, as soon as possible to develop technical standards for landscape lighting is necessary. We do not want to take the detour that others have taken. In addition, experts believe that strengthening the night landscape design, construction of standardized management is also very important. China is currently engaged in lighting design and construction personnel among the professional and technical personnel are few, many produce light pollution and light interference in the night landscape is caused by unscientific design and construction. 1999 "Tianjin city night lighting technical specifications" (for trial implementation), "Tianjin city night lighting technical standards" in 2004, Beijing promulgated in 2007 "city night lighting technical specifications".


3. Vigorously promote the use of new energy-saving light sources.


At this stage, although most places will consciously use energy-saving light sources, but there are still some places fail to consciously use energy-saving light sources lighting.



The light pollution solutions


Improve the lighting system


Many social activists advocate the use of closed fixed light sources as much as possible, so that the light will not be scattered. In addition, improve the emission method and direction of the light source so that all light is directed to its place, in order to minimize the opening of the lighting system.


Closed lighting systems, when properly installed, can reduce the possibility of light leaking into the space above the emission plane. The light that hits below is often exactly where it belongs, because when it hits the atmosphere upward, it produces a sky glow. Some governments and organizations are considering or implementing the conversion of streetlights and open-air stadium lighting systems to enclosed lighting systems.


Closed lighting systems can prevent unnecessary light leakage and reduce sky glow, and also reduce glare, because the light is no longer scattered, people are less affected by unnecessary light. And the program's promoters also point out that closed lighting systems can be more efficient in the use of energy, because the light will be directed to where it is needed rather than unnecessarily scattered into the sky.


Closed fixed light sources allow the use of low energy consumption bulbs become brighter, sometimes better than the use of high-energy consumption but scattered bulbs. However, in any lighting system, the sky glow may be generated by reflected light from the ground, and this reflection should be minimized, such as minimizing the use of high-energy consumption lighting systems and two lighting systems as far away from each other as possible.


The most common criticism of enclosed fixed lighting systems is their lack of aesthetic value. In addition, historically fixed lighting systems have not been a large market and can be considered unprofitable. Due to their particular direction of illumination, enclosed fixed lighting systems sometimes require a professional technician to install them for best results.


ensure-bulbs-are-covered-and lighting-faces-downwards

Adjustment of lighting systems

Different lighting systems have different characteristics and performance, but it is often the case that the lighting system is mismatched, and this can cause light damage. By redirecting the proper lighting system, the effects of light damage can be minimized.


Many astronomers recommend the use of low-pressure sodium vapor lamps to their societies because their single-wavelength characteristics make the light they emit extremely easy to filter and inexpensive. In 1980, San Jose, California, switched all streetlights to low-pressure sodium vapor lamps, which greatly facilitated stargazing at the nearby Lick Observatory.


However, fixed lighting systems using low-pressure sodium vapor lamps are larger than others, and the colors are indistinguishable because low-pressure sodium vapor lamps emit a single wavelength of light that conflicts with the yellow traffic light. Therefore, many government departments are using more easily controlled high-pressure sodium vapor lamps to provide lighting as streetlights.

Smart Energy Management System

Re-scheduling of lighting plans


In some cases, it would be more efficient to redesign existing lighting plans, such as turning off non-essential outdoor lighting systems and turning on lighting systems only in large open-air sports fields that are occupied, which would also reduce light pollution.


In fact, some countries have begun to rewrite their lighting plans, such as the United Kingdom, where the Prime Minister has proposed a detailed suburban lighting plan to protect the environment.


In Calgary, Alberta, Canada, between 2002 and 2005, most residential streetlights were replaced with more efficient types. This program is designed to save money and protect the environment, and the installation costs are estimated to be offset by the savings by 2011 or 2012.