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How to Copy Successful Light Studies with Your Device (Part II)

The EMF Channel Light Dose Database catalogues successful light therapy treatments. You might want to copy those protocols using  your home treatment device.

You can copy any scientific protocol so long as you have a therapy device that emits a similar wavelength. You need the study’s dose and wavelength. You can then use the EMF Channel free Treatment Time Calculator to create a treatment schedule based on your light therapy device’s specifications.

Let’s look up a successful light therapy study, then transfer its treatment parameters to the GembaRed SAIDI light. Read more about the SAIDI in my review here on EMF Channel (opens in new window).

This is part 2 of 3:

Our Example Uses a GembaRed SAIDI Therapy Lamp

The GembaRed SAIDI is one of my favorite red light therapy devices. It emits no non-natural EMFs that might be harmful. You can run it on a cell phone battery for complete portability. It has red and infrared light to treat hundreds of conditions.

What Wavelengths Does My SAIDI Light Emit?

The SAIDI emits 630 nm, 660 nm and 850 nm wavelengths.

You probably know your light’s wavelengths, these are usually prominently featured in therapy device literature. The majority of lights for sale today have approximately 630 nm and 850 nm wavelengths.

Whatever your device’s light wavelengths are, you must match those to the study you want to copy.

If you have a 630 nm light and want to copy a 940 nm study, you will not have the right wavelengths to proceed.

But if you have a 630 nm light and want to copy a 650 nm study, your light is in the right range to continue. As long as it’s close, the method should work for you.

What Power Density Does My SAIDI Light Have?

Power density describes how much light makes it to your body from the lamp. That number decreases dramatically with distance. Instead of asking “what is the power density,” we need ask “what is the power density at the distance I’ll use my device?”

If you hold the lamp on your skin, then you need the power density at zero inches. If it’s one inch away, then you need the power density at one inch. For practical purposes, we usually express power density at zero, 1, 3, 6 and 12 inches.

The SAIDI power densities are as follows:

  • 1 Inch (630nm): 55 mW/cm²
  • 1 Inch (660nm): 46 mW/cm²
  • 1 Inch (850nm): 42 mW/cm²
  • 3 Inch: 26 mW/cm²
  • 6 Inch: 14 mW/cm²

Look at how little distance it takes for the energy transfer to drop off:

  • At 1 inch distance from my target, the 630 nm wavelength light will have 55 milliwatts of energy per square inch of my skin
  • At 3 inches from my target, the 630 nm wavelength energy is only 26 mW/cm^2
  • At 6 inches, it is only 14 mW/cm^2

The SAIDI emits two wavlenths, so we will average the power of the two to come up with one value. You will usually not find multiple values at a given distance like this, it just happens that GembaRed is run by a mechanical engineer who loves precision. For our concern, we’ll take the average of the two reds at one inch and round up to 51 mW/cm^2.

For your lamp, you have to go to the vendor’s information to get this value. You cannot calculate it from any spec they might give you. Power density is NOT the light’s wattage, which is the measure of the power into the device.

The power density is the energy transferred from the device to your skin. The device’s internal design and materials affect this value, so there’s no way to derive it.

SAIDI Example Spec Summary

You should now have your lamp’s wavelengths and power density. You must get these from the vendor. It is impossible to calculate them without using a measuring device. They cannot be derived from any specification in the literature.

Our SAIDI lamp has these specs:

  • Wavelength: 630 nm and 660 nm (red) (it also has 850 nm which we are ignoring for the moment)
  • Power Density: at 1 inch the power density is 51 mW/cm^2

We will plug these into the calculator to figure out how long we should use the lamp per session.

Copy a Successful Anti-Aging Study

The scientific studies give us confidence in how to use the lights for specific purposes. Our job at EMF Channel is to gather up the science about EMFs for both good an bad. In this case, for good!

Red light therapy is the use of electromagnetic fields to heal. Which fields? Let’s ask the science. Then let’s match the light you have with the science to see how to use your lamp to do what the scientists did in their study.

Look at the EMF Channel Light Therapy Dose Database (opens in new window) for issues you want to tackle with your therapy lamp.  There are two good ways to find help. Let’s choose “Aging,” because this is a very popular reason people buy light therapy devices.

Use the EMF Type to narrow the study results down to only those using red light. The SAIDI offers red light, and we want to match that to find a viable study to copy.

Find an Aging Red Light Study

Let’s choose the “Wavelength Range” of Red (630 nm to 700 nm). This narrows the search results to only those aging studies using red light.

Some studies don’t include all the parameters we need. Here is one that states the joules, milliwatts, and wavelengths. Everything we need. We will copy the collagen study. This link opens in a new window here on EMF Channel: Increase Collagen Dose Red Light Dose

Find the Study’s Treatment Schedule and Joules

The summary gives us the dose as follows:

  • Wavelength: 660 nm
  • Joules: 4
  • Treatment time: 160 seconds
  • Irradiance: 50 mW/cm^2
  • Pulsed: Yes
  • Schedule: 3x/Week for 4 weeks

Transfer the Study to the SAIDI Parameters

To copy the study to the SAIDI, we need to know:

  • How close will the SAIDI be to the target (face)? We will hold it one inch away from the face (because we know the irradiance for one inch from the product page)
  • What is the SAIDI irradiance at the distance chosen? The irradiance of the SAIDI at one inch is the average of 55 and 46 mW, which is 50.5 mW/cm^2, so we will say 51 mW/cm^2

Calculate the Treatment Time Using the Free Tool

Take the joules from the study, and the irradiance from the SAIDI, and plug them into the free EMF Channel treatment time calculator. This will give us our treatment time per session.

  • Open the EMF Channel free Treatment Time Calculator (opens in new window)
  • Enter the joules from the study: 4
  • Enter the mW from the SAIDI: 51
  • The calculator tells us that the treatment time is 78.43 seconds, so one minute and 18 seconds.


  • We have transferred the parameters of a successful anti-aging study to a household red light therapy device
  • The study transferred 4 joules of 660 nm light to the target each session
  • The SAIDI outputs 51 mW/cm^2 of red energy when held at a distance of 1 inch
  • The Treatment Time Calculator tells us that it takes 78.43 seconds to transfer 4 joules of red energy when the device outputs 51 mW/cm^2 at one inch