Do UV Sterilization Lamps Really Work?

Published Date: 2023-05-09 10:53:23 Views: 206

With the spread of the new coronavirus in 2019, there is a growing enthusiasm for disinfection products and an increasing demand for UV disinfection products. So do UV disinfection lamps work? We can responsibly say that UV germicidal lamps are capable of eliminating 99.9% of bacteria and viruses within their irradiation range.

UV disinfection lamps are a core part of UV disinfection, and UV disinfection is now a widely used disinfection method. From a distance, UV disinfection is commonly used within laboratories for scientific research work to kill microorganisms and ensure absolute cleanliness levels in the environment; more recently, there are also many indoor air UV disinfection units currently available to ensure food and air safety by killing disease-causing microorganisms through UV irradiation.

Why do so many people choose UV disinfection?

Generally speaking, the commonly used physical sterilization methods can be divided into two types: thermal sterilization and light sterilization, where thermal means using high temperatures to destroy the cellular components of pathogenic bacteria so that they die, and direct heat conduction by air is called dry heat sterilization and sterilization, such as burning and dry baking, and joint heat conduction by air and water vapor is called moist heat sterilization and sterilization, which is more penetrating, such as our common boiling sterilization or laboratory pressure steam sterilization.

Light disinfection is also known as ultraviolet light (UV), which is a wavelength in the spectrum of 100 to 400 nanometers. Usually, it can be further divided into four parts according to the wavelength (λ), namely:

  • Long-wave UVB (315nm < λ < 400nm, UVA)
  • Medium wave UVB (280nm <λ <315nm, UVB)
  • Short-wave UVB (200nm <λ<280nm, UVC)
  • Vacuum UV (100nm <λ<200nm, VUV)

Most UVB and UVA wavelengths are outside the absorption peak of microorganisms and cannot kill them directly, while under UVC irradiation, the structure of the genetic material in microorganisms is destroyed and they cannot grow and reproduce normally and eventually die.

Because of its simplicity, lack of chemical residues, and lack of material selection, UVC disinfection is an ideal alternative to heat disinfection and is the most common method used in healthcare facilities.

Especially in autumn and winter, bacteria and some viruses are sensitive to both UV disinfection and high-temperature disinfection. However, high-temperature disinfection has a narrow scope of application and can often only be used to inactivate small, high-temperature resistant items, whereas UV disinfection can be used to disinfect a wide range of premises, and has the advantages of being simple to operate, having no chemical residues and not causing microorganisms to become resistant, making it arguably the most widely used and accessible disinfection method at present.

In summary, the advantages of UV disinfection and sterilization are that not only is it highly efficient, but it is also easy to operate, as long as you put something in, close the lid, and turn on the switch, you can free your hands and wait for the sterilization without worrying, which is convenient and hassle-free.