HDR
High dynamic range (HDR) was originally introduced in filmmaking as a capture format but has now become primarily associated with monitoring colour spaces.
In the context of monitors and home televisions, the light range is measured in nit values. HDR encompasses a range of 600 nits to 10,000 nits, although it is commonly set at 1,000 nits.
Rather than simply being 'brighter,' HDR should be understood as providing an increased number of steps in the dynamic range. It enables a broader spectrum of colours, similar to a rainbow with a greater variety of available shades.