How long does it take for UV light to sterilize?


How long does it take for UV light to sterilize?

Thus, 20-25 minutes exposure to UV light seemed adequate for disinfection and 30 minute exposure time is recommended for UV disinfection. The efficacy of the inactivation of various organisms at the distance of eight feet from UV source and exposure time of 30 minutes is shown in the table below;

Pros for UV Sterilization: 

  • It is convenient to use and no chemicals are needed. Therefore you won’t leave any chemical residue behind.
  • It is able to kill all kinds of microorganisms, including drug-resistant bacteria.

Cons for UV Sterilization:

  • UVC is dangerous to humans. That is why UV sterilization is usually done using UVC lamps with protective shields. Remember to avoid direct exposure to UVC, especially skin and eyes.
  • It has a major limit! UV only works in its light path and can be blocked by objects. Make sure what you want to be sterilized is directly in line with the UV light. You can minimize this issue by using multiple UV bulbs to generate UV irradiation from different angles.