| Definition: | curve traced on a sphere that has its centre at the light centre of the light source, joining all the points corresponding to those directions in which the luminous intensity is the same, or a plane projection of that curve Note 1 to entry: The English terms "isocandela curve" and "isocandela line", and the French term "courbe isocandela" are no longer in use. Note 2 to entry: This entry was numbered 845-09-28 in IEC 60050-845:1987.
|