As you scan the market for LED Light Therapy devices, you might wonder why some devices have only one wavelength (color) of light, while other devices have a wide variety of wavelengths. And why do some devices deliver only a single wavelength of light, while other devices deliver multiple wavelengths simultaneously.
The answer to those questions can be found in the developmental history of light therapy and how we came from rudimentary beginnings to the current state of the art.
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