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What is Red Light Therapy? Learn the basics of red light therapy and how it fits into everyday wellness routines. How Red Light Works Explore how red and near-infrared light interact with the body at a cellular level. Safety & Best Practices Learn how to use red light therapy safely and build it into your routine.

Warranty & Returns Learn about warranty coverage, returns, refunds, and what to do if there’s an issue with your DEPOWIN product. Orders & Shipping Get information about order processing, shipping, delivery, tracking, and common order questions. Product Support Find product guides, troubleshooting help, care instructions, and answers to common product questions.

Our Story Discover why DEPOWIN was created and what shapes the way we approach everyday wellness. Our Mission See our commitment to making everyday wellness simpler, more accessible and easier to use. Our Technology Explore the technologies behind DEPOWIN products and how we approach thoughtful product design.
SCIENCE EXPLAINED

Understanding Wavelengths

A simple guide to how different parts of the spectrum differ—and which ranges are most commonly discussed in PBM.

RED LIGHT (660 nm)

Visible red light commonly discussed in PBM and wellness applications.

NEAR-INFRARED LIGHT (850 nm)

Near-infrared light has different absorption and scattering characteristics from visible red light.

ULTRAVIOLET (INVISIBLE) Below 400 nm
VISIBLE LIGHT (400–700 nm)
INVISIBLE NEAR-INFRARED (700–1100 nm)
660 nm
850 nm
350 400 500 600 700 800 900 1000 1100 nm
Blue400–495 nm
Green495–570 nm
Yellow570–590 nm
Orange590–620 nm
Red620–700 nm
Near-Infrared700–900 nm
Extended NIR900–1100 nm
660nm

RED LIGHT

VISIBLE LIGHT
A visible red wavelength commonly discussed for more surface-focused optical interaction.
OPTICAL PROFILEMore surface-focused
COMMON CONTEXTSkin and superficial wellness
USED IN DEPOWINYes (660 nm)
850nm

NEAR-INFRARED

INVISIBLE LIGHT
An invisible near-infrared wavelength with different absorption and scattering behavior from visible red light.
OPTICAL PROFILEDifferent scattering and transmission profile
COMMON CONTEXTBroader tissue interaction in PBM research
USED IN DEPOWINYes (850 nm)
BEYOND WAVELENGTH

Why Wavelength Isn’t the Whole Story

Wavelength is only one part of how light is delivered. Irradiance, treatment time, distance and device design also matter.

Irradiance
Treatment Time
Distance
Device Design

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