The human eye can only see wavelengths of light up to 760nm on average. red therapy
uses a wavelength of 810nm&830nm&850nm for the near-infrared LEDs, that a nakedhuman eye oannot observe.
Why do the near-infrared LEDs on my RTL look like they are not working?
Release Time - February 17, 2023
human eye oannot observe.
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