How does UV-C work?
UV-C light irradiation has the ability to kill bacteria, viruses and other microbes by deactivating them at the DNA level given an appropriate UV fluence is absorbed. The germicidal effectiveness of UV-C is established science and has been used to this effect for over 40 years. According to the International Ultraviolet Association: “The portion of the UV spectrum (the ‘germicidal’ region) that is important for the disinfection of water and air is the range that is absorbed by DNA (RNA in some viruses). This germicidal range is approximately 200-300nm.”
What UV-C Intensity is effective?
UV intensity strongly depends on the surface distance from the UV emitter and is measured in µW/cm². The UV irradiance absorbed by a surface over a given period of time is called the "UV fluence" in many cases used synonymous with "UV dose" and is typically measured in mJ/cm². The effectiveness of a given UV-C dose is also highly dependent on the type of microbe being irradiated. The paper below, provides a comprehensive review of the UV sensitivities of many microorganisms. The link can be found here.
- Fluence (UV Dose) Required to Achieve Incremental Log Inactivation of Bacteria, Protozoa, Viruses and Algae
Full UV-C Radiometer Test
Understanding the factors affecting UV Fluence
Full UV-C Banana Test
Learn more about the science behind UV-C technology
These academic sources provide a good starting point for learning more about the unique attributes of UV-C light.
- Using UVC Light-Emitting Diodes at Wavelengths of 266 to 279 Nanometers To Inactivate Foodborne Pathogens
- Microorganisms inactivation by wavelength combinations of ultraviolet light-emitting diodes (UV-LEDs)
- Inactivation of Listeria and E. coli by Deep-UV LED
- Efficacy of an Automated Multiple Emitter Whole-Room Ultraviolet-C Disinfection System Against Coronaviruses MHV and MERS-CoV
- Inactivation of Viruses on Surfaces by Ultraviolet Germicidal Irradiation
- Can biowarfare agents be defeated with light?
- Ultraviolet-C decontamination of a hospital room: Amount of UV light needed
UV-C in the News
- We’ve Been Killing Deadly Germs With UV Light for More Than a Century
- Can you kill Coronavirus with UV Light?
- UV-C Light Kills SARS-CoV-2, Triggering Novel Lighting Options for Public Spaces
- IUVA Covid-19 FAQ
- UV Light Helps Duke Hospitals Fight Transmission of Superbugs
- Opinion on Biological effects of UV-C radiation relevant to health with particular reference to UV-C lamps
- Using the Power of Light: Preventing the Airborne Spread of Coronavirus and Influenza Virus
- UVC robot built by MIT CSAIL disinfects Greater Boston Food Bank
- Lighting firm Signify says UV light breaks down coronavirus particles in seconds
- UV-C Light Kills SARS-CoV-2 Virus Within Seconds of Exposure in Lab Study
- IUVA Releases Fact Sheet on UV Disinfection for COVID-19
- CIE releases two key publications on ultraviolet radiation disinfection
Learn more about Copper
We utilize copper plate in the 'Spectra C Carbon Edition' for its strong thermal conductivity but copper has other interesting attributes which can be read about in the links below.
How do I use the Spectra C?
See our campaign link for a comprehensive overview on the operation and features of the Spectra C.
The Spectra C is NOT a medical device. The Spectra C is NOT A TOY. It is NOT intended for children. We make no claims about sterilization effectiveness of the Spectra C. It is up to the end-user to educate themselves about the UV-C spectrum and properly use the device. Do NOT look directly into the UV-C light. Do NOT expose bare skin to UV-C light.