As you move toward the red
end of the spectrum, the rate of cellular regeneration increased. For
instance, a single frequency in the green range might affect the
kidney 40 times better than a normal base-line study, whereas a red
would be about 4,000 times faster.
University of Chicago, researchers discovered that the average wavelength of cell tissue in the human body ranged between 600 nanometers and 720 nm; 660 is the mid-point. So in essence, the reason a 660 nm works better than any other single frequency is because it is closer to the resonant frequency of cell tissue. The other reason is that 660 nm absorbs better in hemoglobin.
So over the years they migrated to infrared, red and eventually to the 660 nanometer wavelength because it was the fastest way to regenerate tissue. So if you have an injury you would normally recover from in ten days, you can actually recover that tissue in two days by treating it with LED light therapy.
You can even get light into the blood stream. One of the best ways is through your belly button, because the aorta artery is behind the belly button. So if you insert the light there for 20 minutes, every drop of blood in the body will pass in front of the light, increasing the activity of your white cells, red cells, B-cells and T-cells, so you can boost your whole immune system.
High Power Red LED panels have enough penetration to affect the internal organs, good for boosting cellular energy.
For 3 decades red light therapy has been used as an alternative to more invasive treatments for rheumatoid arthritis. Pain in the knees, fingers, hands, wrists, shoulders, back, elbows, neck, jaw, ankles, feet, and toes have all been shown to benefit from direct exposure to light from the red or near-infrared spectrum!