UV is an abbreviation for Ultraviolet light, which is a spectrum of light just below the range visible to the human eye. That is to say UV light is below the blue spectrum of visible light. So UV light cannot be seen by the human eye, and for that reason is often called UV energy.
UV light is divided into four groups as measured by wavelength: (1) Vacuum UV with wavelengths from 100 to 200 nanometers, (2) UV-C at 200 to 280 nanometers, (3) UV-B at 280 to 315 nanometers, and (4) UV-A at 315 to 400 nanometers.
The UV-C spectrum (200 to 280 nanometers) is the most lethal wavelength for microorganisms, because it disrupts the bonds in the between the atoms in the chemicals in microorganisms. This range of wavelengths, with 264 nanometers being the peak germicidal wavelength, is known as the Germicidal Spectrum.
UV light is a safe and natural method to reduce pathogens and algae. UV is as natural as sunlight and does not leave any residuals in the water. It works in harmony with the spa sanitizer by killing some algae and destroying the DNA in others. With the DNA damaged the microorganism can not multiply.
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UV water purification is an excellent and efficient means of expelling living organisms from your water. By using a UV lamp to emit UV rays capable of killing living organisms in water, the UV water system effectively treats your water in conjunction with your complete water treatment systems.
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