A New Challenge

A Deeply Disruptive Force In The Modern World

Unbalanced light spectrums are an entirely new problem for human biology — and our bodies are struggling to cope.

Unbalanced blue light is capable of harming your:
  • sleep
  • hormones
  • brain chemistry
  • skin
  • digestion
  • eyes

Unfortunately, this problem is only getting worse each year.

Even yet, in this new age of bright LEDs, it is possible to protect your health — and your family members — from blue light.

Here’s how.


Throughout human history, the sun was the only source of blue light in the entire solar system.  

After sundown, blue light was gone until sunrise.

Our brains still use this natural light cycle to perpetually train our circadian rhythm.

Blue Light is Everywhere

Modern screens & lights are blue-rich.

Fluorescents, LEDs, Screens

Modern light bulbs were invented to save on energy costs and to help the environment.

Unfortunately, any energy savings are achieved by removing healthy infraRED from the bulbs — and increasing blue output.

Fluorescent Bulb Spectral Output

LEDs are often even worse about this than fluorescents.

Even bulbs labeled “warm” create highly unbalanced light — with very little infrared.


Unbalanced Blue Light

Can Be Harmful

To avoid the harmful effects, blue must be balanced, primarily, by red.

Cytochrome c oxidase

An important enzyme in cellular metabolism (responsible for converting oxygen into water in the cell), cytochrome c oxidase is interrupted by toxins in the environment, as well as unbalanced blue light.

“Cytochrome c oxidase is one of the enzymes damaged by stress and by blue light, and activated or restored by red light.”

Ray Peat, PhD

Eye Damage

Is -UV- the primary risk for light-induced eye damage? Or is it a different light frequency?

Consider this: Daily UV levels are nearly absent for most of the year in temperate climates. In fall, winter, and spring, UV levels hardly reach even moderate levels throughout temperate zones for nearly the entire day.

Further, even in summer, UV levels are quite low for several hours in the morning and evening.

What’s more — as we’ve discussed in the Why Light? page — humans are indoors 99% of the day.

Yet, the myopia epidemic/pandemic is worsening globally, and there’s even robust evidence that what’s behind this is a lack of full-spectrum natural sunlight. In this line of thought, full-spectrum light — which includes UV — is necessary for health of the eye.

Perhaps there’s another threat to the eye, something very similar to UV light, but one that’s present all day and into the night — inside our homes:

Modern eyes are bombarded with high-energy blue light all day, every day.

Unbalance blue light — and a lack of full-spectrum light — appear to be behind the global myopia pandemic.

STUDY: “Harmful blue light-induced effects on human eyes should not be ignored.

Blue light can also produce different degrees of damage to corneal, crystal lens and retina.”


“It’s no secret that blue light harms our vision by damaging the eye’s retina,” says chemist and senior researcher Ajith Karunarathne.


Researchers found that the detrimental effect to the eye did not happen when blue light was mixed with other colors of light.

Unbalanced light matters a great deal to health.

Blue Light Affects Brain Chemicals

Blue light also impacts the regulation of brain chemicals.

Blue light causes dopamine to be released from melanopsin, spiking its levels.

This means that every time we look at a bright screen, we get a hit of dopamine.  

Image result for teens staring at screens

An addictive element to bright screen-use is almost certain — above and beyond the habit-forming entertainment value of the device.

Over time, the perpetual release of dopamine leads to exhausted dopamine levels.

Unable to keep up with the nonstop blue light stimulus, dopamine levels become chronically depressed — resulting in worsened mood, creativity, and decision-making.

As we’ll discuss in the next section, blue light directly undermines the circadian rhythm, affecting serotonin-dopamine balance in the brain and potentially contributing to mental health issues.

To be less harmful, blue light must be accompanied by a greater amount of red light.

Blue Light:

The Circadian Rhythm’s Master

To keep reading…

get Light.


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