This Hikari G10T8 germicidal lamp operates at 9.5 watts and has a medium bi-pin base. Measuring at 13 inches in length, this T8 tube has an impressive life rating of 6,000 hours. The Hikari emits 2.7 watts of ultraviolet output. Use this germicidal lamp for purification and inspection applications. This bulb should not be used for illumination purposes.