Before purchasing an LED screen for your business or company, it is essential to understand two key technical concepts: brightness and contrast. Both parameters determine the visibility, legibility, and visual impact of your advertising content in any environment.

What is brightness in an LED screen?

Brightness, also called luminosity, measures the intensity of light emitted by the screen. The unit of measurement is candela per square meter (cd/m²), more commonly known as nits.

For indoor installations, such as retail stores, restaurants or hallways, a brightness of 1,000 to 1,500 nits is sufficient to guarantee a sharp and attractive image. However, when the screen is exposed to direct sunlight—in a shop window or on an exterior facade—the luminosity must exceed 5,000 nits so that the content is perfectly visible and not washed out by the sun.

For reference, a high-end domestic television emits between 400 and 1,000 nits. LEDLEMON's outdoor LED screens reach up to 10,000 nits in their high-brightness models.

What is contrast in an LED screen?

Contrast expresses the ratio between the brightest white and the darkest black that the screen is capable of reproducing. The greater this ratio, the deeper and more vibrant the colors, and the more striking the image will appear.

A contrast of 2,000:1 means that the brightest point on the screen is 2,000 times brighter than the darkest point. In quality LED screens, this value typically exceeds 5,000:1, offering dense blacks and colors with great vibrancy.

Static contrast vs. dynamic contrast

Static contrast measures the ratio between white and black displayed simultaneously on screen. It is the most reliable data for comparing models.

Dynamic contrast intelligently regulates the intensity of the LED diodes according to the content being displayed: it reduces brightness in dark scenes to produce deeper blacks and increases it in bright scenes. This generates a visual depth that is especially striking in advertising videos.

How these parameters affect your choice

The combination of brightness and contrast determines the effectiveness of your LED screen in its use environment:

  • An indoor screen with moderate brightness and high contrast guarantees accurate colors and a pleasant image without eye strain.
  • A shop window screen needs brightness exceeding 5,000 nits to compete with sunlight and ensure the content is visible from the street.
  • A large-format outdoor screen (facade, monopole) requires maximum brightness and high IP protection to operate optimally day and night.

At LEDLEMON we help you define the exact brightness and contrast specifications for each project. Contact our technical team and we will advise you without obligation.