How to Reduce LED Display Light Pollution: 6 Crucial Pointers

When was the last time you looked at the sky at night and saw stars and the Milky Way? If it was long ago, you might be experiencing light pollution. Light pollution is the excessive or unwanted use of artificial light. It negatively affects our normal lives, rest, work, and even recreation.

LED screens have become part and parcel of our daily lives. While they improve the appeal of our cities, they also illuminate intense light that can have immense effects on the regular urbanites’ lives. This is why LED display owners must consider light pollution when installing their displays.

What Causes LED Display Light Pollution?

LED displays offer numerous benefits, including an immersive visual experience and diverse advertising opportunities. However, they also contribute to light pollution.

Before looking at how to reduce light pollution from LED displays, you must first understand the causes. Here’s how LED displays cause light pollution:

High Brightness

One of the leading causes of light pollution from LED displays is intense brightness. Unlike conventional displays that don’t emit a lot of light or need no light at all, LED displays produce a concentrated beam of light that’s visible over long distances. 

When used on digital billboards and other large displays, LED screens can cause visual discomfort and glare for individuals living or working nearby.

Poor Alignment

LED displays that are not aligned or designed correctly also contribute to light pollution since they direct light to where it’s not intended. For example, a misaligned LED billboard installed by the side of the road may cause glare to drivers.

Blue Light Emission

LED displays are known to emit a lot of blue light. Exposure to blue light has a lot of impacts on humans, such as sleep deprivation and headaches. When scattered into the atmosphere, blue light leads to skyglow. Skyglow is the brightening of the sky at night. This is probably the reason why you rarely see the stars, Milky Way, or other celestial objects.


Light pollution varies based on different conditions. The view of interfering light differs during different outdoor conditions, such as rain, sun, wind, snow, haze, and any other weather. The human eye will judge light pollution under these standards differently based on the influence of these variables. 

For example, LED displays will cause more light pollution at night than during the day. People living or working close to LED screens operating 24 hours per day will be affected most at night. 

Regulation Standards 

LED displays have diverse applications, including in commercial, industrial, and residential industries. They’re also used in areas with high traffic. Adoption of these screens with minimal or no regulation leads to extensive light pollution.

With no regulation, there are no guidelines on how LED screens should be installed and operated. This means they’re installed with minimal consideration of how they affect the surrounding environment.

How to Reduce LED Screen Light Pollution

That said, how can you reduce the effect of LED displays on the environment? Here are some pointers to consider:

Use a Self-Adjusting Brightness Control System

An LED display’s brightness should be adjusted according to the intensity of the ambient light. The screen needs to be visible at all times, but not cause glare. If the light emitted from the display is 60% greater than the surrounding light from the environment, it’ll cause glare. That’s why you need an LED screen with self-adjusting brightness features.

The human eye is used to ambient light brightness of 800 candelas per square meter. The eye can see clearly any image projected up to 8000 candelas per square meter. For, any presentation displayed beyond this range, the eye has to go through several adjustments within a few seconds to see it clearly.

With an automatic brightness adjustment system, the display can be automatically adjusted to make it visible while reducing light pollution, especially at night.

Leverage Multi-Level Grayscale Correction

Grayscale is the number of shades a color can produce from dark to light. For LED displays using grayscale technology, it determines the number of colors that the display can produce. The higher the grayscale, the finer the picture, the richer the details, and the higher the quality of the picture.

A screen’s gray level depends on its system’s number of conversions from digital to analog. Older LED displays have an 8-bit processing system which is 256-level gray. This means these displays have 256 changes of brightness from white to black.

However, these screens have rigid color transition areas, which leads to the incorrect adjustment of color light. But LED display manufacturers are now using 14-bit processing systems. These displays have 16,384 shades meaning they change brightness from black to white 16,384 times. They can display an astonishing 16,384 different kinds of luminance.

In short, modern LED displays have superb color transitions. With a better color transition, the human eye doesn’t glare and people don’t feel discomfort when looking at the screen. 

It’s important to consider this when looking for an outdoor LED screen.

Proper Site Installation and Planning

There are different modes of LED screen installation, including wall-mounted, pole-mounted, floor-installed, and suspended, among many others. Besides, there are many factors to consider during LED screen installation, such as viewing distance, viewing angle, screen size, and surrounding environment.

You also need to select a particular height and inclination to ensure you keep the light pollution under control. For example, when the inclination between the screen and the vertical plane is less than 45 degrees, it’s in line with many people’s viewing angles. This can reduce the effect of stray and direct light on the environment.

Regulate Blue Light Output

The human eye recognizes different brightness levels differently. Due to this complexity, it’s difficult to evaluate how the human eye recognizes light by measuring brightness levels alone. The most accurate measure of the effect of light on the eyes is the irradiance index.

LED display manufacturers should reduce the level of blue light produced by the screens while ensuring high display function. This prevents discomfort to the viewers.

Carefully Choose Display Content

LED displays, whether advertising, public welfare, or guidance, are public media. When displaying something, you must select content that aligns with the public’s requirements to avoid them rejecting you in their minds.

LED Light Distribution and Direction

Light distribution is an important aspect of reducing LED light pollution. This involves setting up the screen reasonably to make the light illuminated spread evenly in the field of vision. This prevents partial harsh light from affecting people in the vicinity.


LED displays have a wide range of benefits, but also have some environmental risks. Light pollution is one of the risks to be aware of. Take practical measures to ensure that your LED display has minimal impacts on the environment and people within the vicinity.

Most importantly, it’s important to work with specialists and experts to ensure that you install your LED correctly and use the right brightness setting to avoid light pollution. Talk to NSE LED Cloud today!

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