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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.
LIGHT SCIENCE

Understanding Treatment Parameters

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

THE BASICS

The 4 Key Treatment Parameters

Each parameter influences how light is delivered and how a device is used.

Irradiance

The amount of optical power delivered per unit area.

Treatment Time

How long a treatment session lasts under a given set of conditions.

Distance

The space between the light source and the target area.

Device Design

LED layout, wavelength output, coverage, beam angle and other hardware choices.

LIGHT DELIVERY

How the Parameters Work Together

These parameters interact. Looking at only one number does not describe the complete light-delivery conditions.

Wavelength Light spectrum
×
Irradiance Power per area
×
Treatment Time Session duration
×
Distance Source spacing
×
Device Design How light is delivered
→
Delivered Light Overall delivery conditions
A USEFUL PRINCIPLE

More Isn’t Always Better

Higher intensity, longer treatment time or a shorter distance does not automatically mean a better protocol.

01

More Intensity

≠ Always Better

Intensity should be considered together with time, distance and device design.

02

Longer Time

≠ Always Better

Longer exposure changes the total amount of light delivered and is not automatically preferable.

03

Closer Distance

≠ Always Better

Distance can change irradiance and coverage, so closer does not automatically mean better.

PUTTING IT TOGETHER

Same Wavelength. Different Delivery.

Two devices can use the same wavelength while delivering light under very different conditions.

Example A
  • 660 nm wavelength
  • Shorter distance
  • Higher irradiance
  • Shorter treatment time
660 nm
Same wavelength
Example B
  • 660 nm wavelength
  • Longer distance
  • Lower irradiance
  • Longer treatment time

Key takeaway: Wavelength alone does not describe the full treatment conditions. Irradiance, distance and treatment time also matter.

CONTINUE EXPLORING

Clinical Research

Explore published studies and reviews related to photobiomodulation and its applications.

Explore Clinical Research

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