luminance
In photometry, luminance is the brightness of an extended surface. In SI units luminance is measured in candelas per square meter but older units include the apostilb, the lambert, and the stilb (equal to 1 candela per square centimeter).
In photometry, luminance is the brightness of an extended surface. In SI units luminance is measured in candelas per square meter but older units include the apostilb, the lambert, and the stilb (equal to 1 candela per square centimeter).
