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standard lamp
electric lamp intended to be used as a reference in photometric or spectroradiometric measurements, for which the calibration is traceable to a primary measurement standard (ISO/IEC Guide 99:2007, 5.4)
Note 1 to entry: This entry was numbered 845-10-20 in IEC 60050-845:1987.
Note 2 to entry: This entry was numbered 17-1256 in CIE S 017:2011.