[] Radiant power evaluated according to its capacity to produce germicidal effects; i.e., in accordance with the germicidal effectiveness of the flux. Unit: W. (See also germicidal action spectrum.)

Note: Because of the ubiquitous low-pressure mercury germicidal lamp whose principal radiation in the germicidal band is at 253.7 nm, 253.7-nm flux often is described as germicidal flux.This should not be confused with the term as defined here, because it has not been weighted in accordance with the germicidal action spectrum.

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