The Osram G15T8/OF (p/n 21083) has been discontinued with no stock remaining. 

Equivalent G15T8 germicidal lamps are available from:  

• Sankyo-Denki - SD G15T8

• Ushio - USH 3000007

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The Osram G15T8/OF (p/n 21083) is an ozone free 15W germicidal lamp (AKA 254nm or UVC) with a typical lifetime of 8000 hours. This lamp has two G13 (medium bi-pin) bases on the 25.5mm diameter x 436mm long (excluding pins) clear T5 tube. This item is made by Osram-Sylvania, and is also commonly available from Philips, Sankyo-Denki, GE, Ushio, UVP, American Ultraviolet, among many others, as part numbers "HNS 15 W G13", HNS15WG13, HNS15W/G13, G15T8, TUV15T8, 11078, 21083, 21259, 21612, 3000007, 34-0008-01, 34000801, GML210, and many more.

Specifications

• Radiated power from 200 to 280 nm (UVC):  4.9W

• Length:  438.0 mm

• Diameter:  26.0 mm

• Typical Lifetime:  9000 hrs

• Burn position:  any

• Bases:  G13 bipins

• Lamp voltage:  55

• Nominal wattage:  15.00 W

• Nominal voltage:  55.0 V

• Nominal current:  033 A

• Lamp current:  0.33 A

 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.