How to Select an Appropriate Brightness Level For LED Screens

LED display screens have quickly become ubiquitous across society today, from subway stations and shopping malls to office buildings and conference rooms. Their energy-efficiency and brightness has earned them widespread popularity. Yet many hold onto an outdated misconception: that brighter is better. In this blog we explore How Can You Select an Appropriate Brightness Level For LED Screens.

What Is an LED Screen Brightness?

LED technology is based on the light-emitting diode, which has both low power consumption and bright light, so its manufacturers often emphasize these qualities to attract customers. Unfortunately, the goal of excessive brightness and energy efficiency is counterproductive. So what can be combined with high brightness and energy efficiency targets?

What are nits in LED Display?

Here are some simple information, you should know about Nits LED display screen.

  • “Nit” comes from the Latin word “nitere,” which means “to shine.”
  • A nit is a unit that measures how bright a screen is.
  • One nit equals one candela per square meter.
  • Imagine a candle inside a cube that’s one meter on each side. The light it gives off is about one nit.
  • You might also know terms like candela, lumens, and lux, which describe brightness.
  • Nits are especially useful when comparing different LED screens, no matter their size.
  • It’s the most common way to measure screen brightness.

What is the difference between nits and lumens?

  • Nits and lumens both measure light, but in different ways.
  • Lumens measure the brightness of light reflected off surfaces.
  • People often use lumens for indoor projectors.
  • Think of nits as the brightness of direct sunlight.
  • On the other hand, imagine lumens as the softer light of the moon.
  • So, when you compare them, nits show how bright a screen can be.
  • Lumens tell you how much light a lamp can spread around a room.
Nits are associated with the light destinationLumens are associated with the light source
Higher nits imply a brighter displayDoes not determine display brightness but only its light intensity
A metric for the measurement of brightnessMeasures how much light a display emits

The easiest way to explain the difference between Nits and Lumens is that one Nit represents more light than one Lumen. For everyday use, such as a video projector, 1 nit is approximately equal to 3.426 lumens.

Convert Nits to Lumens
To get a comparable number of Nits to Lumens, you need to multiply the number of Nits by 3.426.

Convert lumens to nits
If you know the number of lumens and want to know the number of nits, simply divide the number of lumens by 3.426.

Some examples are:


Brightness Range for LED Display Screens

LED display High brightness

The appropriate brightness levels of an LED screen depend heavily upon its intended use case. However, we typically advise using two levels as general guidelines:

IndoorDirect sunlight1500-2500
OutdoorDirect sunlight5500+

Beacuse the brightness of an LED screen may vary based on the specific usage and installation location in practical projects. For indoor applications, different usage scenarios are as follows:

Indoor Usage:

UsageBrightness (Nits)
Document presentation200 – 300
Video playback400 – 600
Advertising600 – 1,000

Regarding different installation locations, let’s take outdoor LED walls as an example.

LED Display OrientationMinimum Brightness (Nits)
Facing East or WestAt least 7,000
Facing South or North6,000

Too bright can cause problems. In certain areas, there may even be regulations that limit the brightness.

When it comes to the brightness, the user must understand that the brightness outside the recommended limit may not always be the best practice. Similar to the method of load restriction for car tires for safe use and performance, exceeding the recommended brightness range of LED display may cause problems and affect their life and performance.

Negative Effects of Excessive LED Screen Brightness

Furthermore, setting too-high LED display screen brightness levels may result in several detrimental consequences:

Lifespan of an LED screen:

The life of an LED screen decreases as its brightness increases. More current flows through the LEDs at higher brightness levels, causing them to wear out faster.

Power consumption of outdoor LED screens:

Brighter LED screens consume more power, which can significantly increase electricity costs and reduce energy efficiency.

Eye strain and potential harm:

Bright LED displays at night can cause discomfort and even damage your eyes, similar to the temporary blindness caused by a flashlight in a dark room.

Project costs often skyrocket if you require extreme brightness for your displays. It’s important to realize that more brightness doesn’t always mean better quality. Striving for high brightness can result in poorer image quality, shorter life, and higher costs.

Balance brightness and environment:

In urban environments, you need to balance the brightness of LED displays with environmental considerations, especially for LED TV screens. Overemphasizing brightness can have a negative impact on the environment, making it an unwise choice.

Brightness Settings and Protection for LED Display Screens

In order to ensure safe use of LED display screens, various measures can be taken:

Adjust Brightness Based on EnvironmentCustomize brightness according to ambient lighting conditions to prevent eye strain and glare.
Regulate Blue Light OutputLimit blue light output from outdoor LED displays to ensure viewer safety.
Monitor Light Distribution and DirectionEnsure light is evenly spread within viewing angles to avoid direct, intense exposure to eyes.
Determine Appropriate Output FrequenciesFollow standard requirements to prevent flickering and discomfort for viewers.
Incorporate Safety InstructionsInclude safety guidelines in user manuals to help users adjust brightness and warn about potential eye damage.
Implement Protective Measures in ProductionTake precautions to protect employees from direct light sources, such as wearing appropriate eyewear.

LED Screen Manufacturers Use Different Ways to Address Brightness

LED display Manufacturers use various strategies when handling high brightness issues:

LED Replacement:

LED display Manufacturers can replace standard LED chips with ones tailored specifically towards higher brightness LED displays such as SMD3535 LED chips, which offer greater brightness capabilities.

Automatic Brightness Adjustment:

LED displays Control cards can be programmed to automatically adjust brightness according to environmental factors, including ambient light sensors that help measure levels and control brightness accordingly. This feature helps decrease viewer glare.


LED display screens have completely revolutionised our visual landscape, but many misunderstand that greater brightness equates to better quality. There must be an equilibrium between brightness and energy efficiency which must be preserved; ideal brightness levels, consideration for any unwanted consequences caused by excessive brightness levels, as well as commitments made towards environmental responsibility are all crucial aspects in LED displays’ success.

LED Display Brightness FAQ

How bright is a LED screen?
Outdoor LED display can have a brightness of up to 6,000-10,000 nits, while indoor LED display have a brightness range of 800 to 1,500 nits.

What causes LED diplays to dim?
LED displays can dim due to, low-quality light bead boards, inadequate heat dissipation, and other external variables.