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.

Science study Red light therapy skin dose

Blue and Red Light Equal at Treating Psoriasis, Blue Better at Reducing Redness

Journal:

Efficacy of blue light vs. red light in the treatment of psoriasis: a double-blind, randomized comparative study

Wavelength:
420, 630
Irradiance:
Condition:
Psoriasis
Outcome:

Researchers treated psoriasis patients without treating it with any photosensitizers. Protoporphyrin IX (PpIX) is an endogenous photoreceptor. Both 420 nm blue and 630 nm red equally reduced psoriasis symptoms. Blue reduced redness more than red.

Science study Red light therapy skin dose

Blue Light, Red Light, and Topical Curcumin Treat Psoriasis

Journal:

Red Light Combined with Blue Light Irradiation Regulates Proliferation and Apoptosis in Skin Keratinocytes in Combination with Low Concentrations of Curcumin

Wavelength:
630, 660, 405
Irradiance:
Condition:
Psoriasis
Outcome:

Researchers combined topical curcumin with 405 nm blue light, and then either 630 nm or 660 nm red light. Both treatment groups showed significant decrease in symptoms. The treatments decreased keratinocytes cell proliferation, which is the primary causative factor in psoriasis symptoms.

Science study Red light therapy skin dose

Non-UV 420 nm and 453 nm Blue Light Psoriasis Regimen

Journal:

Prospective randomized study on the efficacy of blue light in the treatment of psoriasis vulgaris

Wavelength:
420, 453
Irradiance:
Condition:
Psoriasis
Outcome:

Forty patients self-treated with 420 nm blue LED light therapy once a day for four weeks. 20 patients self-treated with 453 nm blue LED in parallel. Both groups should statistically substantial improvement at 4 weeks. Gains reversed when treatment stopped.

Science study Red light therapy skin dose

453 nm Blue Light LED Therapy Psoriasis Regimen

Journal:

Prospective Randomized Long-Term Study on the Efficacy and Safety of UV-Free Blue Light for Treating Mild Psoriasis Vulgaris

Wavelength:
453
Irradiance:
200 group 1, 100 group 2
Condition:
Psoriasis
Outcome:

47 patients with mild psoriasis received 200 mW/cm^2 (group 1) or 100 mW/cm^2) group 2 UV-free blue LED treatment over 12 weeks. Patients reported high satisfaction with the results, which were statistically significant as well.

Science study Red light therapy skin dose

633 nm and 830 nm Psoriasis LED Therapy Regimen

Journal:

Combination 830-nm and 633-nm light-emitting diode phototherapy shows promise in the treatment of recalcitrant psoriasis: preliminary findings

Wavelength:
633, 830
Irradiance:
Condition:
Psoriasis
Outcome:

Nine psoriasis patients used 633 nm red and 830 nm infrared LED therapy on recalcitrant psoriasis. The majority had failed earlier treatments. Seven patients show 60% to 100% clearance of psoriasis symptoms when measured from three to 8 months after treatment. Two of the subjects could not be located.

Science study Red light therapy skin dose

Physician’s Office Psoralen UVA and UVB for Psoriasis

Journal:

Psoralen-ultraviolet A treatment with Psoralen-ultraviolet B therapy in the treatment of psoriasis

Wavelength:
Range
Irradiance:
Condition:
Psoriasis
Outcome:

Researchers treated 25 psoriasis patients with psoralen and ultraviolet-A (PUVA), and another 25 patients with psoralent and ultraviolet-B (PUVB). Psoriasis affected 25-70% of the patient’s skin. After 8 weeks of treatment, 92% of the PUVA group, and 80% of the PUVB group had remission. Limbs and trunk were more resistant than the rest of the body. 28% of PUVA and 24% of PUVB suffered erythema (redness); 32% and 28% pruitis (itchiness); 28% and 24% nausea and vomiting; 16% and 12% fever & malaise; 12% and 16% headache; 1% and 0% blister; 1% and 0% claustrophobia. Researchers concluded that PUVA and PUVB had substantially similar positive outcomes.

Science study Red light therapy skin dose

Narrow Band Ultraviolet B (NB-UVB) Psoriasis Treatment (Not a Home Treatment)

Journal:

Ultraviolet B Phototherapy for Psoriasis: Review of Practical Guidelines

Wavelength:
308
Irradiance:
Condition:
Psoriasis
Outcome:

Physician’s office treatment (not a home therapy) using Narrow Band Ultraviolet B (NB-UVB) for psoriasis patients affected on greater than 10% of the body and have not responded to other treatments. UVB is dangerous without safety precautions. The doctor uses an excimer laser. The patient is treated 2x-3x per week. Is potentially combined with “emollients, calcipotriene, cortico-steroids, retinoids, and tar. NB-UVB can be used in selected patients with traditional systemic agents such as methotrexate, mycophenolate mofetil, and cyclosporine…”

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