As an Amazon Associate an affiliate of several companies, earns from qualifying purchases.

Light Dose Database

Search for red light therapy studies on specific health conditions:

Science study Red light therapy skin dose

Beauty Angel Orange, Yellow, and Red Light Dose

ELT, medium pressure lamp type, partial body treatment area, semi-reclined, (611-650 nm, 7.1 mW/cm^2, ), (570-850 nm, 42.8 mW/cm^2), (611-650 ...
Read More
Science study Red light therapy skin dose

Decrease Wrinkles, Increase Collagen 830 nm and 633 nm Comparison

A prospective, randomized, placebo-controlled, double-blinded, and split-face clinical study on LED phototherapy for skin rejuvenation: clinical, profilometric, histologic, ultrastructural, and ...
Read More
Healthy skin

Four Infrared Light Doses for Better Skin

Infrared and skin: Friend or foe Journal of Photochemistry and Photobiology B: Biology Daniel Barolet, François Christiaensc, Michael R.Hamblin ...
Read More
Science study Red light therapy skin dose

Increase Collagen Red Light Dose

The LED technique involved the application of a 660-nm wavelength delivered in a sequential pulsing mode at a power density ...
Read More
Red Light Therapy circulation dose

Increase Lymphatic Activity Blue, Red, and Infrared Light Dose

420 nm, 7.4 J/area Edge Systems (Signal Hill, CA) Delphia del Sol 420 600–700 700–1000 7.4 J per treatment area ...
Read More
Science study Red light therapy skin dose

Thyroid Safety Using LED Therapy on Neck

Its penetration depth for inducing a therapeutic effect on tissues depends on its wavelength, which varies between 400 and 470 ...
Read More
Science study Red light therapy skin dose

White (411-777) and Red (660 nm) Reduction of Wrinkles Over 12 Weeks

The Efficacy and Safety of 660 nm and 411 to 777 nm Light-Emitting Devices for Treating Wrinkles Background: Low-level light therapy ...
Read More

Search the Photobiomodulation Database for studies on health conditions:

This is the EMF Channel database of light therapy study doses. After getting the results, click to view more study details. Only successful studies are included. 99% of the studies here are on humans, not animals. This database is a work in progress. Many thanks to Vlad for his PBM database. When the data here references his work, the detail page includes a link to the PBM spreadsheet.

About the EMF Channel Light Dose Database

Many people purchase red light therapy or neuromuscular electrical stimulation devices without knowing optimal doses for the results they want to see. The right dose is especially key to light therapies, which have optimal windows of wavelength and energy delivered. Treatment doses outside of those windows will nullify results or harm the user. I took the results from successful EMF studies when these studies included:

  • Photobiomodulation (Red Light Therapy, Blue Light Therapy, Low Level Light Therapy)
  • Transcutaneous Electromagnetic Nerve Stimulation (TENS)
  • Pulsed Electromagnetic Field (PEMF) Therapy
  • Neuromuscular Electrical Stimulation (NMES)

Many studies do not report exact dose parameters they used. They are therefore not included here, even the study reported a therapeutic result.

Table: Light Dose Parameters






Milliwatts (mW) or Watts (W)

Total Dose Energy

joules (J) = power x time = Watts x seconds


Nanometers (nm)


Hertz (Hz)

Spot Size

Squared Centimeters (cm^2)

Duty Cycle

Percentage of time light source is on per cycle

Power Density

Watts per centimeters squared (W/cm(2) = power / probe size


Joules per Centimeters Squared (J/cm^2) = total energy delivered by the probe size

Source: Turchin, Curtis. Light and Laser Therapy: Clinical Procedures 6th Edition (p. 16)