Red light therapy devices emit visible red light, typically in the 620 to 700 nanometer range, and often near-infrared light just beyond what your eyes can see, roughly 700 to 1000 nanometers, at the same time. These wavelengths are chosen because they penetrate skin more readily than other visible light, which is the basic premise behind why these devices are built the way they are and marketed toward skin and general wellness use.
How This Differs From UV Light
It’s worth being clear that red and near-infrared light are not the same as ultraviolet light — they don’t carry the same tanning or burn risk that UV exposure from the sun or a tanning bed does. That said, ‘not UV’ does not mean ‘risk-free,’ and devices still produce real heat and bright light that deserve sensible handling, which later lessons in this module and course will cover in detail.
A Long History of Light-Based Wellness Practice
Using light for general wellness purposes is not a new idea — people have sought out sunlight, colored glass, and various lamps for centuries as part of general self-care practices. Modern LED-based red light devices are simply a more targeted, more controllable version of that same basic impulse, not a fundamentally different or more medically validated category than what came before.
Get Familiar With Your Device’s Specs
If you already own or are considering a red light device, find its wavelength specifications, usually listed in nanometers on the box or product page, and write them down. You’ll use this information in later lessons to set appropriate distance and session length for your specific device.
Action Step
Find and write down your own device’s exact wavelength specifications before your next session.
Educational content only, not medical advice. This does not diagnose, treat, cure, or prevent any condition, and it does not interpret your personal lab results, biometric data, or health status. Some practices described here (cold/heat exposure, supplements, intense physical protocols) carry real risks and are not appropriate for everyone — talk to a licensed doctor before starting any new health, fitness, or supplement practice, especially if you are pregnant or have a heart, circulatory, or other medical condition.