article_snippet: The device uses technology discovered in the 1920s, called dual wave UVC light.
article_snippet: This is a form of UV light and is already used in hospitals and to purify water in fish tanks.
article_snippet: inventor Steve Levy told MailOnline that the device uses technology discovered in the 1920s, called dual wave UVC light.
article_snippet: This is a form of UV light which is already used in hospitals and to purify water in fish tanks, for example.