05-0176-R American Water Service PT20, Aqua-Pure Systems UVLB-1X, ATS (Aqua Treatment Service) EV20E, ATS-4-810, Biolite BIO12, UVLB-1X, Cuno APUV-12, UVLB-1X, Glasco GS4305L, Ideal Horizons 42012, 42012, Master Water HIMSV-20, Neptune (Water Treatment & Accessories), Tri-20, WTA4-810, 5020, 5000, 5030, Purtest PT20, Wedeco 42012, GPH810T5L/4. The lamp is 39 watts, 810 mm in length, rated effective life 10,000 hrs., change once a year

05-0719 replaces American Water Service PT12, ATS - Aqua Treatment Service ATS-4-739, DSW-12V, EV12E, SE12V, Neptune - Water Treatment & Accessories Tri-12, WTA4-739, Purtest PT12, Water Treatment & Accessories - Neptune Tri-12, WTA4-739, GPH739T5LCA/4C