A study published in the journal “Applied and Environmental Microbiology” reports that blue light effectively kills dried cells and biofilms of Listeria monocytogenes, a commonly found pathogen in food processing facilities. While pathogens’ biofilms exhibit strong resistance to eradication, the results suggest that blue light may be effective for surface decontamination. It is noted that blue light is less hazardous for the user compared to ultraviolet light.