Atlantic Ultraviolet Corporation 25 Watt 10,000 Hour 05-1348 Germicidal Lamp features instant start-up and provide the utmost in quality, sustained output and longevity. Approximately 95% of the ultraviolet energy emitted from this germicidal lamp is at the mercury resonance line of 254 nanometers. This wavelength is in the region of maximum germicidal effectiveness and is highly lethal to virus, bacteria and mold spores.