The G11T5 (500 pc min.) is a 11 watt preheat start, ozone free Germicidal (AKA 254nm or UVC ) Lamp with 2.2 Watts UV. Typical lifetime is 8000 hours. This lamp has two G5 (miniature bi-pin) bases on the 15.5mm diameter x 210.5mm long (excluding pins) clear T5 tube. This item is Made in Japan by Sankyo-Denki, and is also commonly available from very few sources as part numbers LTC11T5 and 3000310 . Product Warning: Germicidal lamps emit harmful ULTRAVIOLET RADIATION (UVC). Avoid direct or reflected exposure as this can cause serious skin burns and eye injury. This lamp SHOULD NOT BE USED FOR ILLUMINATION PURPOSES. Skin and eye protection should be worn at all times when operating.