text: Bacteria Test Kit for surfaces
  UV lights, often known as black lights, are frequently used
  in cleaning service to identify concealed diseases on walls, high-touch areas,
  ledges, furniture, and a variety of other surfaces. The lights induce bacteria,
  urine, seminal secretions, and blood to "fluoresce," making them
  visible to the naked eye.
  UV lights are commonly used to test surfaces, particularly
  when there is a disease epidemic or a significant spike in the incidence of a
  specific disease at a specific period or location. While many facility managers
  and cleaning experts are aware of UV lights, they are frequently unaware of how
  to use them.
  Some of the important steps of employing a UV system,
  according to Brad Evans of OptiSolve, are as follows:
  1. To detect germs on surfaces, choose a professional-grade
  UV light system that emits UV rays at extended frequencies ranging from 100 to
  400 nanometers (400 nanometers is the equivalent of around 1.6 inches).
  2. Make sure the test area is clear. In some circumstances,
  this may include using an all-purpose cleaner to clean the area first.
  "However, do not sterilize or disinfect the test area," Evans said,
  "since this can skew the results."
  3. If you're evaluating the surfaces of furniture or
  appliances, make sure they're easily accessible before you start UV testing.
  4. Protect your eyes with UV-protective glasses or goggles.
  5. in the test area, turn out all lights. For the UV light
  to expose microorganisms, the test areas must be as black as possible.
  6. If testing a whole area, begin in one corner and work
  your way around the room, hovering over any surfaces that appear to be
  contaminated. According to Evans, bacteria and other pollutants will usually
  ignite when exposed to UV light.
  Because using UV lights is a time-consuming operation,
  managers and cleaning experts should be aware that they have other options if
  they are concerned about germs hidden on surfaces. Many healthcare and food
  service establishments, for example, now employ imaging technologies to make
  the unseen visible, so obviating the need for many of the processes outlined
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