15W Uvc Lamp For Air Purifier

The UV Spectrum and Far UV-C

The ultraviolet spectrum is a band of electromagnetic radiation at higher energies (i.e., shorter wavelengths) than visible light (see Figure 1), divided into three major categories: UV-A (315-400 nm), UV-B (280-315 nm), and UV-C (100-280 nm); vacuum-UV (VUV, 100–200 nm), is further defined as a sub-category of UV-C. While there are some differences among definitions that have been presented to define the ranges of UV radiation, for the purposes of this White Paper, we further sub-divide UV-C into germicidal UV (UVGI at 250-280 nm), Far UV-C (at 200–230 nm), and vacuum-UV (VUV, at 100–200 nm).†

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How Does Ultraviolet Germicidal Light Sanitize Air and Water?

Ultraviolet germicidal light bulbs (UV-C) produce short wave radiation between 100nm and 280nm in the electromagnetic spectrum. These wavelenghts are lethal to bacteria, virus and other microorganisms. Specifically, UV-C light causes damage to the nucleic acid of microorganisms by forming covalent bonds between adjacent bases in the DNA. The formation of these bonds prevents the DNA from being released for replication. The pathogen cannot reproduce and dies.

A principal advantage of the ultraviolet germicidal light method for disinfecting is that it does not use chemicals or heat. It has proved to be a reliable method of sanitizing air and water.

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