UV 55 watt bulb for Lennox # X8794 Ultraviolet Germicidal Replacement UVC Lamp 55 watt Base - 2G11 (4 pin straight) Replacement for all fixtures that use GPL55 UVC bulb Use with Breath Clean UV Air Purifier Replacement for Lennox # X8794, Model # PC020-28, PC016-28, PC014-23