Outdoor LED content: why brightness and contrast matter
Sunlight is the enemy of every outdoor display. The specification that wins the fight is not resolution — it is nits, contrast and how the content is graded.
Daylight is 100,000 lux
A bright interior is around 500 lux; direct sunlight on a façade exceeds 100,000. An indoor display at 1,000 nits vanishes outdoors. Serious DOOH surfaces run 5,000 to 10,000 nits, and the difference between the two is the difference between legible at noon and legible at dusk.
Contrast is what the eye reads
Brightness gets attention; contrast delivers the message. Black-face LEDs, louvered masks and matte surface treatments reduce reflected sunlight so dark content stays dark. A 7,000-nit display with poor contrast reads worse than a 5,000-nit display with deep blacks.
Outdoors, the sun is your competitor for every pixel. Design the content to win.
Grading content for the street
- 01Favour high-contrast compositions: light type on dark fields or the reverse — never mid-tones on mid-tones.
- 02Avoid fine detail below 3% of screen height; at 30 m it disappears.
- 03Use motion sparingly and slowly; passing viewers see a frame, not a film.
- 04Schedule brightness: full output at noon, 30–40% after dark to protect neighbours and LED lifespan.
The engineering behind it
High brightness generates heat. Cabinets need sealed IP65 construction, efficient thermal paths and drivers rated for continuous duty at -20 to +50 °C. Energy-efficient LED platforms lower running cost — on a 100 m² façade, a 16% efficiency gain is measured in thousands of euros a year.