Light Dose Database

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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.

Red light therapy brain dose

Vielight Treatment Measurable Brain Improvements in N=1 Traumatic Brain Injury Patient

Journal:

Changes in Brain Function and Structure After Self-Administered Home Photobiomodulation Treatment in a Concussion Case

Wavelength:
810
Irradiance:
Condition:
Cognition, Traumatic Brain Injury
Outcome:

One 23-year old traumatic brain injury patient complained of headaches, anxiety, and difficulty concentrating. He home-treated with a Vielight Neuro Duo. At an 8 week measurement he had increased brain volume, improved functional connectivity, increased cerebral perfusion, and neuropsychological improvements.

Red light therapy brain dose

Severe Brain Damage Transcranial Laser Brings Improvement, Epileptic Fits

Journal:

Transcranial Low-Level Laser Therapy May Improve Alertness and Awareness in Traumatic Brain Injured Subjects with Severe Disorders of Consciousness: a Case Series

Wavelength:
785
Irradiance:
10
Condition:
Cognition, Traumatic Brain Injury
Outcome:

Five traumatic brain injury patients with cognitive disabilities received transcranial 785 nm infrared laser 5 times per week for 6 weeks. They showed improved awareness and alertness, but two epileptic fits corresponded with treatment earlier that day. The fits also corresponded with concurrent antibiotic treatments.

Red light therapy brain dose

Traumatic Brain Injury Lesion Red Light Dose

Journal:

Transcranial Photobiomodulation Therapy in the Cognitive Rehabilitation of Patients with Cranioencephalic Trauma

Wavelength:
630
Irradiance:
25.73
Condition:
Cognition, Depression, Emotion, Sleep, Traumatic Brain Injury, Headache, PTSD
Outcome:

Improvements in immediate recall, information processing speed, verbal learning, PTSD stress reduction, depression reduction, reduced headache, improved sleep, and many more benefits.

Red light therapy brain dose

Traumatic Brain Injury Red Light Dose

Journal:

Improved Cognitive Function After Transcranial, Light-Emitting Diode Treatments in Chronic, Traumatic Brain Injury: Two Case Reports

Wavelength:
633, 870
Irradiance:
22.2 mW/cm^2
Condition:
Cognition, Traumatic Brain Injury
Outcome:

Improve cognition and memory in chronic TBI patients.

Red Light Therapy circulation dose

Increased Brain Blood Flow Red Light Dose

Journal:

The Effects of Transcranial LED Therapy (TCLT) on Cerebral Blood Flow in the Elderly Women

Wavelength:
627
Irradiance:
70
Condition:
Cognition, Dementia/Alzheimers, Traumatic Brain Injury
Outcome:

Increase cerebral artery blood floow, decrease resistance.

Red light therapy brain dose

Better Reaction Time in Concussion Patients Red Light Dose

Journal:

Acute Effects of Near Infrared Light Therapy on Brain State in Healthy Subjects as Quantified by qEEG Measures

Wavelength:
903
Irradiance:
16.67
Condition:
Cognition, Dementia/Alzheimers, Traumatic Brain Injury
Outcome:

Decrease physical reaction times in concussion patients.

Red light therapy brain dose

Traumatic Brain Injury Anxiety and Depression Red Light Dose

Journal:

Psychological Benefits 2 and 4 Weeks After a Single Treatment With Near Infrared Light to the Forehead: A Pilot Study of 10 Patients With Major Depression and Anxiety

Wavelength:
810, 980
Irradiance:
810 nm, 13.2 W/0.89 cm^2, and 810 and 980 nm, 9W/0.89 cm^2
Condition:
Addiction, Alcoholism, Anxiety, Cognition, Depression, Emotion, Traumatic Brain Injury, PTSD
Outcome:

Decrease depression and anxiety in TBI patients.

Red light therapy brain dose

Improved Brain Oxygenation Red Light Dose

Journal:

Transcranial Laser Stimulation Improves Human Cerebral Oxygenation

Wavelength:
1064
Irradiance:
250
Condition:
Cognition, Dementia/Alzheimers, Traumatic Brain Injury
Outcome:

Improve brain oxygen supply.

Red light therapy brain dose

Increase Brain Blood Flow in Vegetative Patient Red Light Dose

Journal:

Focal Increase in Cerebral Blood Flow After Treatment With Near-Infrared Light to the Forehead in a Patient in a Persistent Vegetative State

Wavelength:
830
Irradiance:
11.4
Condition:
Cognition, Traumatic Brain Injury
Outcome:

830 nm, 11.4 mW/cm^2, 1800 s, 2/day/73 days (146) improved blood flow and correlated with patient regaining cognition.

“The patient showed some improvement in his neurological condition by moving his left arm/hand to reach the tracheostomy tube, post-LED therapy.”

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.

Light Dose Parameters
Term
Parameter
Time
Seconds
Power
milliwatts (mW) or Watts (W)
Total Dose Energy
joules (J) = power x time = Watts x seconds
Wavelength
nanometers
Frequency
Hertz (Hz)
Spot Size
cm(2) (centimeters squared)
Duty Cycle
percentage of time light source is on during one cycle
Power Density (or Intensity)
Watts per centimeters squared (W/cm(2) = power / probe size
Energy Density (Fluence)
jules per centimeters square (J/cm(2)) = total energy delivered by the probe size

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

Image by Thomas-Suisse from Pixabay