Brand-new lamp, compatible with the Philips brand PL-S 9W/TUV (325126) and others.  It measures 165mm (about 6.5 inches) with a G23 base (two pins on either side of a plastic base).   Its peak output is at 254nm.  It is rated at 9 watts. This lamp is used to replace these and many other OEM lamps, to give the same performance: Air-Care D200 American Ultraviolet, Inc. AP600 American Ultraviolet, Inc. GML370 American Ultraviolet, Inc. RM-9U-105 Angelo Décor International Inc. Pond Building Series 9-Watt UV Clarifier Beckett Corporation PBF3000 Beckett Corporation PBF750 Cal Pump BF1000 Cal Pump UV9 Catfish Lighting 9 watt Coralife 3x Coralife 77082 Coralife Turbotwist 9 Watt Custom SeaLife Double Helix Custom SeaLife Double Helix 9 Watt Fish Mate 9 watt General Electric 15877 General Electric 40696 General Electric GBX9/UVC GermGuardian 6815A GermGuardian EV9102 GermGuardian EV9102CA GermGuardian EV9102PL GermGuardian EV9LBL Hozelock Cyprio BioForce 1000 Hozelock Cyprio BioForce CF9DS Hozelock Cyprio Easy Clear 1000 Hozelock Cyprio Eco Clear 1000 Hozelock Cyprio UVC 1327 Hozelock Cyprio UVC 1328 Hozelock Cyprio Vorton 1000 Hozelock Cyprio Vorton 2000 Hozelock Cyprio Vorton 4000 Light Sources, Inc. LTC9W/G23 LightTech Lamp Technology, Ltd.,LTC9W/G23 Oase Living Water 54984 Oase Living Water Bitron 9 Oase Living Water Filtoclear 600 Oase Living Water Filtoclear 3000 Oase Living Water Filtoclear 4000 Oase Living Water Filtoclear 800 Osram Sylvania Ltd. 21062 Osram Sylvania Ltd. GCF9DS/G23/SE/OF Osram Sylvania Ltd. HNS S 9W G23 Purely UV Products PUVH2309 Sankyo Denki GPX9 Tetra Pond PLS9 Tetra Pond UV1 Tetra Pond UV1 Pond Clarifier Ushio 3000304 Ushio GPX9