Replacement UV lamp for Aqua Pure UV-P11W UV rays were discovered about 200 years ago. After years of experiments and research, science confirms that it is an excellent way to eliminate viruses and bacteria. Ultraviolet radiation is divided into 3 waves, the A, B, and C waves. 240-260nm of C-rays are the most effective with the strongest point being at 253.7nm. The Aqua Pure UV Lamp inhibits the growth of bacteria by destroying their DNA core, making it impossible for them to reproduce . This technology is very effective against bacteria, as well as many resistant pathogens. We mention a few: E. Coli, Legionella, Salmonella, Hepatitis, Poliovirus etc. Characteristics: UV lamp (PHILLIPS™) Power: 11 Watt Current: 220V/50Hz Dimensions: Diameter: 16 mm Length: 212.1 mm