36W 36 Watt 110V Aqua Medic Helix Max UV Sterilizer Bulb 2G11 Base # 80836-8
Base: 2G11. Other Known Codes: Coralife Turbotwist, Tetra, Double Helix, OASE Bitron. The compact size of bulb allows for a small system design and design flexibility. It has an average life of 10,000 hours.