This bulb has an average life of 10,000 hours, compared with 1,000-1,500 hours of regular fluorescents; that also means this bulb uses about 1/6th the energy of regular light sources.
This replacement blub is for Daylight Slimline Magnifying Lamp / 5 inch(C1387). Blubs are sold individually.
Purpose: Fits 5" Magnifying Lamp (C1388).