The Osram G36T5/G5/OF is a 39 watt preheat start, ozone free Germicidal (AKA 254nm or UVC) Lamp with 12 Watts UV. Typical lifetime is 9000 hours. This lamp has two G5 (miniature bi-pin) bases on the 15.5mm diameter x 846mm long (excluding pins) clear T5 tube. This item is made by Osram-Sylvania, and is also commonly available from very few sources as part numbers G36T5L/G5, G36T5/MBP and GPH843T5/G5. 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.