"Care 222" UV lamp...can be used to
disinfect enclosed spaces where people frequently come in and out of...by using
a wavelength of 222 nanometers...a separate study conducted by
Columbia University found that more than 99.9% of
seasonal coronaviruses present in airborne droplets were killed when
exposed to the 222 nanometers wavelength for around 25 minutes....the lamp is being sold for
¥300,000 ($2,868). The firm said it was currently only accepting
orders from medical institutions, but has plans to increase sales to other
areas once production catches up with demand" https://www.newsweek.com/uv-lamp-coronavirus-japan-1533559
Its important to remember that "254-nm UVC is considered to be hazardous to human health as it is a potential cause of dermatitis and skin cancer" and now many companies may start selling UV lamps falsely claiming that they use the safety 222-nm wavelength even when they do not.
