The candela per square meter (cd/m2) is the derived SI unit of luminance for a surface. It is used to characterize the amount of visible light from a light-emitting surface, such as the light provided by a display device. From Wikipedia "The sRGB spec for monitors targets 80 cd/m2. Typically, calibrated monitors should have a brightness of 120 cd/m2. Most consumer desktop liquid crystal displays have luminances of 200 to 300 cd/m2. High-definition televisions range from 450 to about 1500 cd/m2."
The unit cd/m2 is called a nit.
The unit cd/m2 is called a nit.