The use of ultraviolet (UV) light to kill germs and bacteria has been around since 1903 when Niels Finsen won the Nobel Prize for Medicine after using UV light against tuberculosis of the skin. Shortly after this, in 1910, the French town of Marseilles began the now-standard practice of using UV light to disinfect the town’s drinking water.
Since then, the science behind using UV light as a disinfectant has grown exponentially, with scientists finally concluding that it is short range UV light (UVC) also known as ‘germicidal UV’ which is responsible for rendering bacteria and other microorganisms as primarily harmless. The effectiveness of UVC in an environment is dependent on a variety of influencing factors, such as the particles involved, the length of exposure and the ability of the bacteria to withstand UVC light.
Not only is UVC light particularly effective at neutralising harmful bacteria or at the minimum preventing them from growing and multiplying but it is also an eco-friendly disinfectant. It harnesses the same ultraviolet light that is radiated by the sun and simply concentrates it in a more effective manner in order to kill a greater amount of microorganisms.
Also, ultraviolet lights are used to detect things such as bodily fluids including blood, semen and saliva (as anybody who watches television crime shows like CSI will already know) and organic material deposits. What this means is that not only will UVC light kill microorganisms and bacteria on surfaces, but they will also illuminate areas that are frequently cleaned inefficiently or where they haven’t been cleaned at all.