Key points from article :
UV light-emitting diodes (LEDs) can quickly and effectively kill the human coronavirus HCoV-OC43.
Different UV LED bulbs emitting varying wavelengths were tested.
Virus well plate received an incident irradiance of 0.4 mW/cm2.
Wavelengths of 285 were highly effective at inactivating the virus - inactivating 99.9% of the coronavirus in 30 seconds.
Other viruses showed similar sensitivity to these wavelengths - could be useful against SARS-CoV-2.
300nm LEDs required 3 times the dose of 285nm radiation.
285-nm UV LED is less expensive and more readily available than the 265-nm variety.
“We discovered that it is quite simple to kill the coronavirus using LED bulbs that radiate [UV] light.” — Prof. Hadas Mamane, researcher.
Researchers used HCoV-OC43 instead of SARS-CoV-2 because it only requires Bio Safety Level 2.
However this technology is hazardous and not recommended for residential use.
Research by Tel Aviv University published in Journal of Photochemistry and Photobiology B: Biology.