Research and Publications

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Long-term effects of 222 nm ultraviolet radiation C sterilizing lamps on mice susceptible to ultraviolet radiation

Germicidal lamps that emit primarily 254 nm ultraviolet radiation (UV) are routinely utilized for surface sterilization but cannot be used for human...

Repetitive irradiation with 222nm UVC noncarcinogenic, safe for sterilizing human skin

Joint research between Kobe University and Ushio Inc. has provided proof for the first time in the world that direct and repetitive illumination from...

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Far-UVC wavelengths for disinfection are unlikely to harm skin

Far-UVC (200 – 220 nm) has been proposed as an effective disinfection radiation that is safe to humans5. In 2014, Woods et al. undertook a...

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Exploratory clinical trial on the safety and bactericidal effect of 222-nm ultraviolet C irradiation in healthy humans

Introduction: Surgical site infection is one of the most severe complications of surgical treatments. However, the optimal procedure to prevent such...

Extreme Exposure to Filtered Far-UVC: A Case Study

Far-UVC devices are being commercially sold as “safe for humans” for the inactivation of SARS-CoV-2, without supporting human safety data. We felt...

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Evaluation of acute reactions on mouse skin irradiated with 222 and 235 nm UV-C

Biological response and DNA damage following irradiation with shorter wavelengths in the UV-C range were evaluated to investigate the safety at three...

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Anti-microbial effect of filtered 222nm excimer lamps in a hospital waiting area

Christian K. Holm:

Background Hospital acquired infections is a considerable challenge for vulnerable patients. Ultraviolet light based on the excitation of mercury...

Far-UVC Radiation: Current State-of Knowledge

The International Ultraviolet Association (IUVA) has released a white paper titled “Far-UVC Radiation: Current State-of Knowledge,” which is a...

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Inactivation of Coronaviruses and Phage Phi6 from Irradiation across UVC Wavelengths

Ultraviolet (UV) devices emitting UVC irradiation (200–280 nm) have proven to be effective for virus disinfection, especially on surfaces and in air,...