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low-pressure mercury lamp
low-pressure mercury vapour lamp
discharge lamp of the mercury vapour type, with or without a coating of phosphors, in which during operation the partial pressure of the vapour does not exceed 100 Pa
Note 1 to entry: This entry was numbered 845-07-22 in IEC 60050-845:1987.
Note 2 to entry: This entry was numbered 17-701 in CIE S 017:2011.