The PLT G25T8 germicidal UV T8 lamp has a medium bi-pin base, a 1-inch diameter, and an average life of 8,000 hours. It has an ultraviolet output of 6.9 watts at a wavelength of 254 nm. Operating at 25 watts, this bulb is intended for use in disinfectant applications. This bulb should not be used for illumination purposes.