DEPRECATED: isolux curve
DEPRECATED: isolux line
locus of points on a surface where the illuminance has the same value
Note 1 to entry: The terms "isolux curve" and "isolux line" are no longer in use.
Note 2 to entry: This entry was numbered 845-09-57 in IEC 60050-845:1987.
Note 3 to entry: This entry was numbered 17-616, 17-617, 17-622, and 17-623 in CIE S 017:2011.