A question we frequently get asked when supplying our precisely measured irradiance data goes something along the lines of "I've seen on other red light therapy brands' websites that their devices' irradiance is listed as being greater than 100 mW/cm², why is yours so low?". The shortest answer is: because many companies use inaccurate measurement equipment and like to inflate their numbers. The unfortunate situation is that a lot of companies have been measuring their devices with solar power meters, devices which are optimized for the spectrum of sunlight. These devices tend to overestimate the irradiance of a narrow-wavelength LED device like red light therapy lights by as much as 4x. Many companies have simply reported these inaccurate measurements on their website, and it has become so industry-standard at this point that they're afraid to report the real numbers. Some companies have had independent testing done with proper equipment, but usually don't display the results of this very prominently on their website. Most academic research on red light therapy uses doses in the range of 10 to 50 mW/cm².  At-home LED devices delivering >100 mW/cm² is not only very questionable, it also wouldn't be desirable. Red light therapy has shown to have a biphasic dose response curve, both too low and too high of a dose can reduce effectiveness. Besides supplying our customers with accurately measured data, we think it's important to chart out the irradiance across a wide range of distances, rather than giving a single measurement. This way, our customers will know exactly what amount of light energy they receive, and can do their own self-experimentation, backed by the available research.