![]() "The damage that's being done is also not instantaneous," Gwynn adds. There has to be some time for the device to be in place for it to be able to do the work it's intended to. ![]() "This is a hazard you can't see," explains Pamela Gwynn, principal engineer for UL's Life and Health Sciences related to medical equipment. The listing makes no mention of the potential hazard UV light poses to eyes and skin. This UVC wand is sold by Walmart for $20. UL is unwilling to certify wands like those due to the high risk in an uncontrolled home setting. The biggest concern, UL's experts say, are uncontained devices like light wands that could potentially expose a user's eyes or skin to the invisible UVC light at close range, causing damage. One potential source of risk is older, mercury-based UVC lamps, as well as lamps that emit ozone, which can be toxic to the lungs - but newer, UVC LED lamps are a potential hazard, as well. "The risk may increase if the unit is not installed properly or used by untrained individuals. ![]() "UVC lamps used for disinfection purposes may pose potential health and safety risks depending on the UVC wavelength, dose, and duration of radiation exposure," the guidance reads. The FDA is now warning consumers about UVC lights, too, with new guidance issued this summer. "Nevertheless, in the midst of COVID-19, we are concerned about proliferation of UVC disinfecting devices being sold with uncertain safety features and incomplete operating instructions." "We know that UVC is a proven way to help eliminate dangerous bacteria and viruses in water, air and on surfaces," says Karen Willis, NEMA's industry director for lighting systems.
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