NOTE: This definition was changed in RP-16-17 Addendum 4. Deletions have a strike-through. New text is bold.
Vision with fully adapted eyes at luminance conditions between those of photopic and scotopic vision; i.e., between about 5 cd/m2 and 0.001 cd/m2. 3.4 cd/m2 (0.32 cd/ft2; 1.0 fL), and 0.034 cd/m2 (0.0032 cd/ft2; 0.01 fL).« Back to Definitions Index