The invisible light can kill viruses and pathogens like the one that causes COVID-19, but experts are raising alarms about the potential safety risks. //

"UL has made a conscious decision not to certify the consumer-facing, portable, handheld wand-type devices due to the inability to manage the risks," Straka tells CNET.

"What we would suggest is definitely looking at products that do have a safety certification from a nationally recognized testing laboratory, such as UL," Straka adds. "There are installers and commercial-grade products out there that do have a safety certification and which can be installed and used very safely."