Researchers are of the opinion that UV water purification provides a safe solution as this method of sterilization is a purely physical process and does not alter the pH, chemistry or taste of water. This method is both economic and environmental friendly and is a much better option to chemicals and their bi-products. People are of the opinion that this system provides a safe solution against microorganisms such as giardia and cryptosporidium, that are resistant to chlorine disinfection. The UV lamps emit wavelength energy of 254 nm and this energy reacts with the genetics of the microorganisms. Keep water safe from contamination with UV Germicidal Replacement lamp for 05-1340-R.