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direct lighting
lighting by means of primary light sources and luminaires having a distribution of luminous intensity such that the fraction of the emitted luminous flux directly reaching the working plane, assumed to be of infinite extent, is 90 % to 100 %
Note 1 to entry: This entry was numbered 845-09-14 in IEC 60050-845:1987.
Note 2 to entry: This entry was numbered 17-319 in CIE S 017:2011.