This section is a work in progress.

Definitions

Candela - The candela is the luminous intensity, in a given direction, of a source that emits monochromatic radiation of frequency 540 x 10¹² hertz and that has a radiant intensity in that direction of 1/683 watt per steradian. (Source: NIST)

Misc Info

1. Daylight responsiveness of human eye cones limited to luminance of 1 cd/m² or greater. (Source: Bernd Girod)