UV has proven to be a quick, reliable and cost effective method of water treatment for both point-of-use (POU) and point-of-entry (POE) systems. Being a chemical-free, environmentally friendly, and affordable UV water filter system, iSpring UVF55 UV water filter, for which this UVB55 UV lamp works, can protect the whole house against impurities commonly found in private wells as well as in city water. For houses that get water from municipal water suppliers, this UV light water filter provides a great solution against chlorine-resistant impurities so that you know you and your loved ones get clean water for drinking, washing, showers and more. Build your trust in water for your entire household by removing risks unable to be addressed by your municipal treatment plant or those born with well water or other natural water sources.