Specifications guide
Understanding light therapy specifications
A reference library for evaluating red and near-infrared light therapy devices — covering how output is measured, what specifications actually mean, and why most marketed figures are unreliable.
Why watts say little about red light therapy effectiveness
Electrical wattage describes how much power a device consumes — not how much therapeutic light reaches your skin. This article explains why irradiance (mW/cm²) is the specification that determines dose, and how to interpret what manufacturers actually publish.
How light therapy irradiance is measured — and why it’s difficult
Accurate irradiance measurement requires cosine-corrected detectors, wavelength-matched calibration, defined geometry, and traceable instrumentation. This article explains each factor and why consumer meters often report values that differ substantially from laboratory measurements.