Light Shapes Health

Every Spectrum of Light is Bioactive

Each day, light frequencies either harm or improve the health of your:

  • skin
  • gut
  • sleep
  • eyes
  • hormonal balance
  • brain chemistry
  • weight regulation
  • metabolism

Restorative Light

Believe it or not, healthy light frequencies improve all bodily functions.

Why? Because each spectrum of light — both visible and invisible — causes a cascade of biological activity, even at very low intensity.

The body is designed to receive and detect light — and then respond to it with metabolic and hormonal action.

Every minute of the day and night, even! Photoreceptors in eyes and skin detect light and send signals to the brain, telling it what the light in the environment is doing.

It’s not just the brain, though! Local tissues respond to environmental and therapeutic light as well.

These effects are not minimal — and they’re not slight. They are deep and impactful to your health.

Can light play a role in your health strategy?

Absolutely! Come along, let’s enjoy this fascinating journey into the unseen world of light — and how it can improve our lives.

Table of Contents

Where the light does not enter — so enters the doctor.

~ ancient proverb


Human Vision

& and its limitations

The human eye sees a small slice of the total light spectrum.

The sun produces energy across an extremely broad spectrum. The tiny portion the human eye can see is referred to as visible light.

What about the rest of the spectrum that the human eye cannot detect — the frequencies that are invisible?

Those are still light. The invisible wavelengths are just too small or large to see.

Smaller than the visible spectrum is the invisible UV spectrum. If UV light were any larger in frequency, it would be blue light, and it would be visible.

Just larger than red light is infrared light — which is also invisible. If infrared waves were any shorter, they’d be red, and we’d be able to see them.

All visible light is perceived as a color by the human brain.

The Visible Spectrum

In physics, every time a frequency doubles, it’s referred to as an octave.

In music, the major scale covers one octave.

All scales are based on one octave — not just the major scale!

All visible light colors exist in only one octave, too!

For reference, a grand piano has 8 octaves.

But the electromagnetic spectrum (light) has 81 octaves.

And visible light is just one octave!

If the light spectrum were piano keys, here’s how the light spectrum would look:

That’s fun to think about, isn’t it? But the best way to think about light — for your health — is actually quite simple. Light has three main parts.

3 Parts of Light

Think of light this way: as three main parts — all affecting health differently.

  • UV
  • Visible light
  • Infrared

For general thinking about healthy light, ignore the X-rays, gamma rays, microwaves, and radio waves.

Instead, focus on the most important spectrums of light — those which greatly impact health on a daily basis. They are:

  • UV
  • Visible
  • Infrared

Solar Radiation Peaks in the Visible Spectrum

Most life on earth is highly attuned to the visible spectrum.

It’s a narrow spectrum — only one octave — but it accounts for 42% of the sun’s power output.

A significant portion of sunlight’s power radiates in visible wavelengths — 42% is in the visible octave.

Healing Natural Infrared

A majority (54%) of sunlight is invisible infrared light.


Natural Infrared + Red Light

When the sun’s red and infrared output are combined, they make up a whopping 68% of total sunshine.

This means that more than 2/3 of sunlight is restorative infrared and red light frequencies.

68% of sunlight is infrared & red — a large majority of sunlight’s output!

Incredible Health Benefits

…of red and infrared light.


Research on Healing Light


Insulin Resistance & Weight Regulation

Cardiovascular Health

Joint Pain & Inflammation


Ocular Health

Bone Health


Light Therapy is Photobiomodulation

A scientific term for therapeutic light.

“Photobiomodulation (PBM), also known as low-level laser (or light) therapy (LLLT), has been known for almost 50 years.”

In recent years, much knowledge has been gained in this area.

Michael Hamblin, PhD — Harvard University
The term “photobiomodulation” was coined in the mid-90s and in 2015 it was added to the National Library of Medicine official terminology.
For decades, researchers found that therapeutic lasers produced verifiable results for pain, inflammation, healing, smoking cessation and even hair regrowth. They tended to assume the important component was the fact that the light was in the form of a laser, a very intense beam of light.

It turned out, however, it wasn’t the laser aspect that provided the healing. By the mid-90s, it was clear that the wavelengths of light themselves — not the laser aspect — were responsible for the successful findings.

Thus, the study of “low-level laser therapy” became the study of “photobiomodulation” (the study of how light affects changes in the body).

LEDs became the technology of choice because they can deliver specific wavelengths to bodily tissues.

LEDs can provide very specific wavelengths.

PICTURED: A cheap 660nm red LED grow light from Amazon.

Virtually All Wavelengths Have Been Studied. Some Excel at Healing.

The most impressive healing results come from the frequencies found in visible red light (around 660nm) and near infrared frequencies (around 880nm).

Photo = LIGHT
Bio = LIFE
Modulate = TO CHANGE

Light can change living organisms.

ALL wavelengths of red & infrared light provide benefits to practically every cell in the body.


Compare: Red -vs- Infrared

Sharing many similar characteristics for our health, these two frequencies do have a few differences.

Red Light is Visible

If an object looks red, red light is coming from it — and entering the eye.

A red LED emitting red light.

Infrared Light is Invisible

The human eye cannot see infrared light. The wavelengths are too long — just longer than red light.

An infrared LED appears to be off — even when turned on.

As we discussed earlier…

Infrared means “Beyond Red”

Infrared wavelengths are too long for our eyes to observe.

(On the other end of the spectrum, UV rays are too short for our eyes to see).

But Special Technology Can See Infrared Light

Night-Vision Goggles

These $1,000 night-vision goggles detect “invisible” infrared light to “see” in the dark.

Security Cameras

Night-vision surveillance cameras “see” infrared light. This camera even has infrared LED’s to shine on potential criminals.

“Heat Signature” = Infrared Light

Image result for heat signature night vision

The “night-vision” camera can see this dog at night.

(More infrared wavelengths are coming out of the dog’s eyes and mouth — fur absorbs infrared light.)

Amazingly, even though infrared light is invisible, we can sense it in another way:
We actually FEEL it.

How? Invisible infrared light is felt as heat.

After all, heat, essentially, is infrared light.

Humans can see light frequencies — and also feel light frequencies.

What cooks the food? Infrared light.

Why does this matter? Because these frequencies of light can change our bodily health!

Light Penetrates
Into the Body’s Tissues

All frequencies of light penetrate into the body — but every wavelength only penetrates to a very specific depth.

Some frequencies penetrate very deeply, while others barely enter the body at all.

Tissue Penetration Depends on The Wavelength

The longer the wavelength, the deeper light penetrates into tissues.

Blue light barely penetrates at all, just 2-4 millimeters.

Red light penetrates several inches into the flesh.

Infrared can penetrate deeply into the body, nourishing even the inner organs.

Penetration Depth In Human Tissue

Blue Light  


Red Light


Infrared Light


Infrared Rays Penetrate Deepest

All light travels in a straight line, and infrared is no different.

This deep penetration into the body allows infrared therapy to affect all tissues and organs in the body.

Why does this matter? Because some wavelengths of light — red and infrared — can actually nourish, repair, and help heal your inner organs and tissues: including your thyroid, your gut, your brain, and muscles.

The (Healthy) Incandescent Light Bulb

90% of incandescent output is infrared light.

Thomas Edison invented the light bulb, but it mostly produced invisible infrared.

The criticism of incandescents: Too much wasted light (as heat, a.k.a. infrared).

“An incandescent bulb is a better heater than light bulb.”

— Lighting industry circa 2010

Throughout the 2010s, countries began banning the sale of incandescents to save energy costs and burn fewer fossil fuels.


Modern Lighting

Modern lighting provides almost no red & infrared.
Typical Fluorescent Bulbs
Typical LED Bulbs

Typical fluorescent & LED bulbs save on energy costs.

——-> By removing the healthy red & infrared light.

Are We Always Indoors?

The average American spends 93% of their life indoors, with another 6% in automobiles.
— Environmental Protection Agency, 2001

That’s 99% Indoors

14.4 minutes. That’s 1% of the day.

It’s how long the average American spends outside — each day — as of 2001.

What are the health implications of spending nearly all time indoors?

For sure, air quality is typicall much worse indoors: On average, indoor pollutants are 5 times worse than outdoor air, but are often 100 times worse.

Beyond air quality, there’s a lack of healthy spectrums of light: Red and infrared just aren’t to be found indoors.

Stats for the Average American

93% indoors
+ 6% in automobiles 
= 99% of life spent indoors.

On average, 99% of modern life is spent indoors.

As a result…

For most people, artificial lighting is the only lighting the body ever receives.

Few people get much sunshine, or therapeutic light.
Infrared & red light are absent in modern life.
But they didn’t use to be.

Humans Throughout History

Throughout history, humans spent more waking hours in direct or indirect sunlight.

Humans Have Long Depended on Fire to Survive

Fire is incredibly rich in red & infrared light.

The contrast couldn’t be more stark: Modern people receive far less nourishing red & infrared light from the environment.

“Penetrating red light is possibly the fundamental anti-stress factor for all organisms.

The chronic deficiency of such light is, I think, the best explanation for the deterioration which occurs with aging.”
— Ray Peat, PhD

Congratulations! You’ve completed Why Light?

What Has Light Done For Me?

Red and infrared light have tremendously impacted — and improved — my life.

The “healthy light” trend is growing globally! Professional athletes are using red light to improve recovery after both exercise and injuries. Hair is being regrown at (expensive) hair clinics — using simple red light technology available on Amazon.

Light therapy is resulting in better sleep, energy levels, pain perception, workouts, post-exercise and post-surgery recovery, mood, digestion, gut health, and better skin.

I personally utilized red & infrared light as a foundation of my recovery from hypothyroidism and mold illness. I noticed the light spurred my digestion and metabolism, while also improving my circadian rhythm and sleep.
My sluggish brain became more active after exposure to these healing wavelengths of light.

Working with clients, I’ve seen therapeutic light improve thyroid & Hashimotos lab numbers, and increase energy levels and brain function in the elderly. Joint and muscle pain has been relieved in folks of all ages.

I even saw one seemingly miraculous recovery of a terminal health condition, with the only difference being heat lamp therapy and gardening. I can’t scientifically say that was the difference-maker, but I will say this: Light is powerful.

Best of all, it doesn’t have to require much effort to receive therapeutic light. It usually involves sitting down, resting — in the presence of healing light.

Don’t feel pressure! This is not a burden, something you have to do, or else. Ideas like these are, simply, here to help you — if you feel inspired to use them.

Virtually everyone can benefit from “good” frequencies of light. In chronic illness and aging, these restorative frequencies are even more important — as the body becomes more sensitive to its needs, and dependant on every synchronizing element it can find.

My health came back to me — in part — because I realized and believed in light’s profound biological impacts. Without light, my improvements in sleep, digestion, and metabolism wouldn’t have had the same momentum.

Everything we do to push our momentum forward — toward progress — can be a good thing! Especially we know how to use it: With an eye toward the interconnectedness of all things biological, and a fresh motivation, rather than a stale burden. These things are only here to help you. If you don’t feel inspired to take action, wait until that inspiration comes!

How might healthy light affect your life?

This completes ‘Why Light?’
To continue, select ‘InfraRED.’

Infrared & Red

Blue Light

Early Light


Light | Dark

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