Global Lighting Association issued a position statement on night lighting

Recently, the Global Illumination Association (GLA) issued the “Night Lighting: A Position Statement on the Importance of Quality Lighting and Night Maintenance”, which clarified the GLA’s views on night lighting.

The role of night lighting

In the modern society of the 24-hour cycle system, for outdoor occasions during sunset and sunrise, or places like parking lots, streets and pedestrian tunnels, lighting is essential to provide people’s safety and comfort. Road lighting greatly promotes traffic safety, enabling road users to spot obstacles, moving vehicles and other dangerous situations. In outdoor public places, a good understanding of the surrounding environment and the ability to observe others at a sufficient distance are essential for creating a positive social atmosphere and ensuring the safety of public places. Lighting can affect the characteristics of an area, which in turn affects the mood and behavior of residents. Obviously, practitioners who work between sunset and sunrise, such as those engaged in emergency services, industry, transportation, and logistics, rely on good lighting to ensure safety and effectiveness during work. The existing outdoor application standards set the most basic requirements for lighting to achieve these functions.

The importance of night protection

The biological evolution and human history on the earth have been influenced by the day and night cycles of sunlight in nature. Therefore, the inhabitants and biosphere on the earth have developed biological dependence on the basis of this cycle. At night, the introduction of electric lighting in our buildings and natural environment will affect biological processes, will limit the ability of humans to explore and study the universe, and reduce the pleasure of seeing stars in a dark night sky. For these reasons, achieving night maintenance in a respectful manner is essential for night lighting solutions.

Inferior quality, wrong specifications and improperly installed outdoor lighting will damage the night environment and waste energy. Illuminate the edge of the road, curbs and sides can detect people and animals near the road. However, light spilling outside the useful area can be harmful and should be avoided. Spilled light is projected to areas other than expected and affects nearby residents in the form of glare or light intrusion (for example, from an illuminated sports field). This is called interference light (see Note 1). Other sources of light pollution are illuminated exterior walls and billboards. It should be avoided that uncontrolled uplight is projected into the sky, it will cause the sky to glow, hinder the observation of the night sky, and may cause wild animals to lose their way. Light pollution causes energy waste, which can be reduced by using high-quality sensor control or connected lighting equipment (see Note 2), and in many cases, light pollution can even be avoided (see Note 3).

Special area lighting

Although light is extremely important in promoting human night activities, in some special areas, some activities and species require extra attention. In order to protect wild animals near densely populated areas, if necessary, a protective cover should be used to achieve precise lighting. Without considering human safety and positioning, the lighting can be dimmed or turned off. By using a combination of special light spectrum and dimming or interconnected lighting, the interference of outdoor lighting on nearby astronomical observatories or the interference of nocturnal wildlife (such as migratory birds, bats and insects) can be reduced.

Global Lighting Association Recommendation

High-quality outdoor lighting is the joint responsibility of lighting designers, lighting installation owners and operators, and lighting manufacturers.

1. Make a good lighting design

A. Choose a suitable light source, and focus on a wider perspective in addition to the initial cost and energy efficiency.

B. When applicable, the requirements of special areas shall be part of the lighting design.

C. Apply outdoor lighting related application standards to avoid excessive lighting

2. Use high-quality lighting control

A. Use sensors and controllers as much as possible

B. Use interconnected lighting for lighting management and maintenance

3. Use up only where needed

A. Use shields and precise beams when necessary to prevent light overflow and intrusion

B. Use appropriate optics to prevent glare

4. Use up only when needed

A. According to human night activities, electric lighting is used between sunset and sunrise

B. Dim or turn off the light when it is quiet


1. Intrusion light refers to the overflow light that causes annoyance, discomfort, distraction, or reduced ability to view basic information such as traffic signals (CIE ILV) due to its quantity or directional properties.

2. Interconnected lighting can be defined as the connection (wired or wireless) of lighting, control devices and sensors to allow automatic control of the operation of lighting.

3. Light pollution is the sum of all the adverse effects of artificial light (CIE ILV).

Bcrelux Electronic Co., Limited

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