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P.s. Reading patent details: "to prevent the at least one radiation from having any wavelength that is outside of the range can be provided or which can be substantially harmful to cells of the body". What means "substantially harmful" radiation ? That is harmful but not so much ? A little bit harmful, maybe? Tell me if I'm wrong, because, for me, if something can't damage anything is "harmless", not "probably harmless" or "not substantially harmful". That is the language of the lawyers or the sellers. They simply don't know yet.

P.S.2 What about photochemical effects ? You put this inside a home and UVC start to discolor everything around. Besides piss off customers, could create serious legal problems to the seller. You know, damage to expensive furniture, paintings, etc.