Specific wavelengths of blue and violet light are lethal to some organisms. Not only can they kill certain insects, they have now been shown to kill particular strains of Salmonella and other bacteria. Visible light, therefore, could help reduce foodborne illnesses.

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Specific wavelengths of blue and violet light are lethal to some organisms. Not only can they kill certain insects, they have now been shown to kill particular strains of Salmonella and other bacteria. Visible light, therefore, could help reduce foodborne illnesses.