Why We List Two Irradiance Numbers

You may notice that we list two irradiance figures for our products. That’s intentional - and it reflects our commitment to transparency in an industry that still lacks standardized testing methods.

Most red light therapy brands report irradiance using solar power meters. These meters were originally designed to measure full-spectrum sunlight, not high-powered, narrowband LED light. When used on red and near-infrared therapy devices, solar meters can significantly overstate output - sometimes by as much as 2–3×. Some companies rely on these readings simply because they don’t realize the limitation; others use them because inflated numbers make marketing claims like “most powerful” easier to support.

Because there are currently no universally accepted testing standards in the red light therapy industry, we publish more than one measurement - and we clearly state the measurement method used.

Whenever independent third-party laboratory data is available, we publish it. Our panels have been tested by LightLab International, an independent, accredited laboratory, using professional-grade measurement equipment specifically designed for LED therapy devices.

In some cases, we may also publish internal testing data obtained using a high-end spectroradiometer - a very sophisticated and expensive scientific instrument designed to precisely measure spectral power distribution and irradiance. In our experience, spectroradiometer measurements have consistently aligned with independent laboratory results, making them functionally interchangeable from an accuracy standpoint. However, both of these professional measurement methods are meaningfully different from solar meters and provide far more reliable data for red and near-infrared therapy devices.

For full transparency, all of our panel testing data is available here:
https://mitoredlight.com/blogs/mito-red-blog/independent-third-party-testing

We believe consumers deserve accuracy, transparency, and honesty. Our lights are powerful, well-engineered, and - after more than seven years in business - trusted and loved by our customers. Publishing real measurement data, clearly stating the instruments used, and distinguishing between professional testing methods and solar meter readings is part of our commitment to doing business the right way and helping raise the bar for the entire industry.