What is LED screen brightness, and why is it important?
As a business owner, event organizer, or someone simply investing in display technology, one of the most critical factors to consider when choosing an LED screen is its brightness. LED screen brightness is a key specification that determines how visible and effective your display will be in various environments, whether indoors, outdoors, or in mixed lighting conditions.
In this guide, we’ll dive into the world of LED screen brightness and uncover why it plays such a crucial role in display performance. We’ll explore what LED screen brightness means, how it’s measured, why it’s important, and how to select the right brightness for your needs.
By the end of this article, you’ll have a clear understanding of LED screen brightness. Let’s start by answering the following question: What is LED screen brightness?
In This Article
What is LED Screen Brightness?
LED screen brightness refers to the amount of light emitted by an LED screen, usually measured in nits (or candelas per square meter, cd/m²).
Brightness is one of the defining characteristics of an LED screen, dictating its ability to display content clearly, especially under varying lighting conditions.
In a simpler sense, brightness is the ‘luminance’ of the screen that we observe as viewers.
High brightness values mean the screen appears “brighter” and is more visible under bright ambient light conditions.
Conversely, lower values are typically sufficient for dim lighting or controlled indoor environments, where excessively bright screens may feel uncomfortable or glaring.
People usually use nits to describe how much light a screen emits per unit area. For example, a display rated at 500 nits emits 500 candelas of light for every square meter of its surface. In other words. One Nit equals one candela per square meter (1 nit = 1 cd/m2)
Why is Brightness Important for LED Screens?
Brightness is one of the most crucial characteristics of an LED screen.
It plays a defining role in determining the effectiveness and functionality of a display, regardless of its location or application. Whether it’s an indoor boardroom screen, a retail sign, or an outdoor digital billboard, brightness is integral to the screen’s ability to perform in its intended environment.
Generally, there are two main factors as follows.
1. Ensures Visibility in Different Ambient Conditions
One of the primary reasons brightness matters is its impact on visibility.
As we know, LED screens need to function in varying environments. For open-air outdoor applications, sunlight poses the biggest challenge, as direct glare can diminish screen visibility.
To combat this, LED displays are designed with high-brightness levels.
In comparison, an indoor screen in a shaded environment such as a conference room typically operates at less than 800 nits of brightness.
Without optimal brightness:
- Outdoor screens may appear washed out or invisible under strong sunlight.
- Indoor LED screens may become hard to watch due to excessive glare or oversaturation.
2. Comfortable Viewing
Another reason is, that brightness can directly affect human comfort and health.
Screens that are too bright in dim environments can lead to eye fatigue, strain, or even headaches during prolonged viewing.
Equally, a screen that is too dim in bright environments can cause squinting and discomfort.
Factors Affect the Brightness of an LED screen
Now, you already understand just how crucial brightness is for LED screens. You might be wondering—what are the key factors that can affect a screen’s brightness?
The following is the common factors:
Type of LEDs Used:
1. Type of LEDs Used
High-efficiency LED chips generally produce more light while consuming less energy.
Currently, Nationstar LED is the most stable LED and can reach up to 8000cd. If the LED screen is designed with Nationstar LED Golden wire, the brightness can reach 10000cd. However, the price is the highest.
Other brands of LED such as Kinglight, Ruishen, San’an also have excellent brightness standard which is over 5000cd. These are the common LEDs for most LED video walls because they have a low price with a high brightness level.
2. Driving IC
Generally, higher-quality LED chips result in higher brightness LED screen.
The common drirver IC includes ICND2037, ICND2038, ICN2053, ICN2153, MBI5124, MBI5253, SM16169, ICND2163. etc
For more information, check here.
2. Screen Construction
In addition, factors like pixel pitch (distance between pixels), and LED screen size affect how much light a screen can emit.
As we know, a smaller pixel pitch means more LEDs are packed into the same area of the LED screen, resulting in a higher density of light emissions.
This directly affects the brightness of the screen, as the increased number of LEDs allows for more light to be emitted uniformly.
Here is a blog post about pixel pitch, you check this to learn more.
Lumens and Nits: Measuring Brightness
When discussing LED screen brightness, two terms are commonly used: lumens and nits.
Lumens
Lumens is a measure of the total amount of visible light emitted by a source. It provides an overall sense of how much light a screen generates but does not account for how that light is distributed over the surface area of the display.
For example, a projector and an LED screen with the same lumens rating can appear vastly different in brightness because the light from a projector is dispersed, while for an LED screen, it is concentrated.
Nits (cd/m²)
The term “Nit” originates from the Latin verb “nitere,” meaning “to shine,” and is used to describe the brightness of video displays. Specifically, one Nit equals one candela per square meter (1 Nit = 1 cd/m²).
What is the difference between nits and lumens?
As we all know, Nits mainly measure direct light, which is the light emitted directly from a screen or display surface,
In contrast, lumens mostly measure the total amount of reflected light or light emitted from a source in all directions.
For displays, the focus is on the intensity of light that reaches the viewer from the screen, which is why nits are used.
Lumens, on the other hand, are commonly used for measuring the total brightness of light sources, such as projectors or light bulbs, which distribute light more diffusely.
This is why the brightness parameter in LED display specifications is often listed as nits or cd/m².
To provide a comparison, 1 nit is approximately equal to 3.426 lumens, but this is dependent on the size and type of the display because nits are concerned with the light intensity per square meter rather than the total output of the light source.
For example, a projector might have a high lumen rating but appear less bright than an LED screen with high nits because the projector’s light is spread over a larger area and partially reflected.
Here is the common nit and corresponding lumen value table:
| Nit (cd/㎡) | Lumens |
| 2500 | 8565 |
| 3500 | 11991 |
| 4500 | 15417 |
| 5500 | 18843 |
| 6500 | 22269 |
| 7500 | 25695 |
Types of LED Screen Brightness
LED screen brightness can be more specifically categorized into different levels, typically determined by the environment where the display is utilized.
Here is a simple calculation formula you can follow:
Indoor Brightness
Indoor environments generally have controlled lighting conditions (such as artificial light), so LED screens used indoors do not require high brightness levels.
In General, the brightness for indoor LED screens falls between 500 and 1000 nits.
This brightness is suitable for small meeting rooms or home theaters, retail stores, shopping centers, churches, exhibitions, hotel lobbies, stages, TV Studio, museums, etc.
Advantages of low indoor brightness:
- Reduce light pollution
- Reduces unnecessary energy use since dim environments don’t demand high brightness.
- Comfortable and good for eye health.
Outdoor Brightness
For outdoor displays, natural sunlight is the primary hurdle.
LED screens designed for outdoor use require substantially higher brightness levels, with typical ranges between 3000 and 10,000 nits, depending on exposure to sunlight.
Here are 3 main ranges:
- Standard Outdoor Brightness (3000-5000 nits): Suitable for shaded outdoor spaces.
- High Outdoor Brightness (5000-7000 nits): For bright daylight use, such as in semi-direct sunlight.
- Extreme Brightness (7000+ nits): Required in environments with direct, unfiltered sunlight, like highways, sports stadiums, desert areas, or high-profile urban billboards.
Outdoor Brightness is mainly designed for applications such as outdoor Billboard advertising, building-mounted LED video walls, sports scoreboard displays, LED Signage billboards, transportation LED billboards, etc.
How to Control LED Screen Brightness?
Controlling the brightness of an LED screen is essential for achieving optimal visibility, saving energy, and ensuring a comfortable viewing experience.
There are three common ways to adjust the brightness: manual adjustment, scheduled automatic adjustment, and brightness sensor control.
Manual adjustment
Manual adjustment allows users to set a fixed brightness level through software by inputting a specific brightness value.
Once configured, the screen maintains this brightness setting, regardless of the surrounding conditions. Whether it’s daytime, nighttime, sunny, or rainy, the brightness remains constant unless the user manually updates it again.
The clear downside of this method is its inflexibility as a fixed brightness level may not adequately address changes in ambient lighting
In addition, This method can also increase energy consumption since the screen might use more power as it always keeps a brightness value forever.
In the meantime, this adjustment way can leave an uncomfortable viewing experience at certain times—such as when a screen is too bright at night or too dim during the day.
Scheduled Automatic Adjustment
Because of the defects of manual adjustment, the automatic adjustment method came into being.
Scheduled automatic adjustment is a more dynamic option for controlling LED screen brightness.
Using this method, an LED software program is configured with a pre-determined schedule of brightness values based on time intervals.
For example, during the bright hours of the day, the brightness level may be set higher, while during the night, the system can automatically lower the brightness. As time progresses and the schedule changes, the brightness values adjust accordingly.
Obviously, this method is much more flexible than manual adjustment as it allows the screen to adapt to different times of the day without user intervention.
However, it does have its limitations. Programmed schedules do not take into account real-time weather or light condition changes.
For instance, the brightness won’t automatically adjust for cloudy or rainy conditions, meaning the system might either overuse energy or under-illuminate in certain scenarios.
If you use Novastar Software, here is a guide to LED screen brightness adjustment.
Brightness Sensor Control
Brightness sensor control is the most advanced and energy-efficient method for managing LED screen brightness.
This approach utilizes an external ambient light sensor that is integrated into the LED display system. The sensor continuously monitors the intensity of environmental light and adjusts the screen’s brightness accordingly, in real-time.
For example, if the environment becomes brighter (e.g., on a sunny day), the sensor automatically increases the screen’s brightness to ensure visibility.
If the surroundings get darker (e.g., at nighttime), the sensor reduces the brightness to avoid glare and save energy.
Resource
As above mentioned, brightness is very important for LED video walls. However, if the LED screen is not well configured or connected, you might encounter many problems such as different brightness in different areas.
To fix this problem quickly, check this post: Fixing Different Brightness on LED Screen.
In addition, the LED screen software is also needed for the Scheduled automatic adjustment, you can click the following to get the corresponding application here.
To Sum Up
In this post, we have learned about what is LED screen brightness and how it impacts visibility, energy efficiency, and viewer comfort.
We also covered the different methods to control brightness, including manual adjustment, scheduled automatic adjustment, and advanced brightness sensor control.
If you’re planning to invest in or optimize your LED screen, it’s crucial to choose the right brightness setting to ensure your display performs effectively while minimizing power consumption and maximizing its lifespan.
If you still have questions about LED screen brightness, how to implement specific control systems, or which brightness sensors to use, feel free to contact us. Our team of experts is here to guide you in choosing the right solution for your needs!