Brightness is only one aspect of a TV’s overall performance, but it’s the one that gets the most attention. There are two main reasons why brightness is important in the best TVs. The first is you’ll want its picture to compete with other light sources in a room such as lamps and daylight coming through windows – a higher level of brightness means you won’t see reflections from these sources interfering with the picture.
The second reason has to do with high dynamic range (HDR). TVs and movies with HDR can contain extremely bright highlights, ones exceeding 1,000 nits (a standardized unit used for measuring TV brightness, which is equivalent to cd/m2 or candela per meter squared) or even higher. To effectively convey that level of highlight detail, a TV must provide sufficient brightness.
