Replacement ultraviolet lamp for the Hanovia PMD 200C/1/6 medium-pressure disinfection system. Medium-pressure UV lamps lose output steadily through life rather than failing outright, so they are replaced on elapsed running hours against the system’s dose record, not when they stop lighting. The full model designation matters when ordering: the PMD range runs across several chamber sizes and lamp lengths, and the suffixes after the model number identify the specific build. Reference number 2201-1205.