Brightness

Brightness is how much light the wall puts out, measured in candelas per square metre. The same unit is usually called nits. More nits help the picture compete with daylight or bright gym lighting. More nits also draw more power and make heat.

Indoor gym scoreboards and arena displays often land in the low thousands of nits, enough to fight house lights without blasting the room. Fine-pitch boardroom walls can run lower still, because the room is controlled and people sit close.

Some outdoor jobs are close-up: drive-through and sidewalk menu boards, window-facing fine pitch around P1.2, that kind of thing. People stand a few metres away. In that range, about 1,500 nits is a common outdoor brightness target. The wall still has to fight daylight, but it is not trying to be read from across a parking lot.

Long-throw outdoor signs are another class. In Canada the winter sun sits low. Light skims the face of the wall, and an LED mask does not throw the same shadowing you get when the sun is high. The picture washes unless the wall is very bright, often more than 8,000 nits. Most LUXVISION outdoor product is built at 10,000 nits for that reason. Automatic brightness sensors still matter at night so the same sign does not light up the street.

Spec sheets quote peak brightness. Ask what the wall runs at in normal operation, and whether the warranty still holds at that level.