Light therapy is generally considered safe for most people (in fact, some research papers declared 33 that there is an “almost complete absence of side effects” associated with red light treatment). In addition, the American Academy of Dermatology considers LED treatment to be safe.

Of course, there are things to keep in mind when using the tools.

First and foremost, you need to find a quality product (more on that below). Because, as the experts explained to us, less-than-stellar options have flooded the market, leaving a lot of poorly made options in the hands of users. “If the LED light doesn’t have the right wavelength, it won’t do anything; you can also use Christmas lights,” says esthetician Natalie Aguilar.

Anecdotal reports suggest that some people find red light therapy irritating or bothersome to the eyes, but this can be remedied by wearing protective glasses.

Finally, always follow the brand’s instructions. Esthetician Aneta Zura, co-founder of Atelier Beauté, generally recommends placing the device panel 1 inch away from the face, but some manufacturers may have different protocols. “All applications, distance and time depend on the condition of the skin and the device used,” she says.