The Ultimate Guide to Red Light Therapy: How to Use Red and Near-Infrared Light Therapy for Anti-Aging, Fat Loss, Muscle Gain, Performance Enhancement, and Brain Optimization

by Ari Whitten

Now that you understand the importance of the power density of the light, here’s the big problem with most lights on the market. Most devices being sold (that you might pay $100-$900 for) are: Grossly underpowered and simply too low wattage to reach therapeutic power densities of above 50mW/cm2 with large coverage of body areas. This is especially problematic for treating deep tissues. So you’d end up having to use the light for extended periods (sometimes upwards of 20-40 minutes) to generate an effect. Moreover, the weaker lights won’t penetrate deeply into the body and to even treat any deeper issues, even with extended exposure times. Very small, and thus, only treat a small area of your body. Even if a small light has optimal power density, a small light that radiates light on only 5-10 square inches will require multiple treatments to cover a significant portion of your body. (Note: This is a major limitation with small LED devices.)