Shining a Healthy Light on

Earth Day

Happy Earth Day! In honor of preserving this Earth, we’d like to call attention to the ways in which light can negatively impact humans and animals. We’d also light to share how you can truly make an impact by utilizing healthy light and being mindful of WHEN you use it.

Studies show that the blue light found in most artificial light sources has biological and physiological impacts on humans, animals, and even plants. While the lighting revolution has prolonged the hours of light ready available to humans and essentially changed how our society functions, there are some serious downsides to consider. The increased levels of light pollution and sky glow (luminance of the night sky, apart from natural light sources such as the Moon and visible stars) in night-time environments threatens entire ecological systems and makes it much more difficult (and often impossible) to see the night sky clearly.

Animals truly do have a hard time with unnatural lighting.
Birds, for example, rely on the moon and stars for navigation when they migrate. With the extended hours of light in today’s offices, it’s unfortunately a lot more common for these birds to collide with brightly-lit skyscrapers at night.

Turtle populations have also notably plummeted over the years, partly because of urban lighting that disrupts nesting sites. Hatchlings use moonlight reflecting off waves to guide them towards the water. With the overabundance of urban lights, and tourists running on beaches with flashlights, many turtles either head inland or move toward the water at the wrong time — into danger nonetheless. In fact, researchers have found that 1 in 3 turtle hatchlings move toward city lights rather than the sea.

When overexposed to artificial lighting, particularly at night, insects suffer too. They are attracted to the bright white light will end up circling street lights instead of pollinating or procreating, which can either directly kill them or cause them to become easy prey for predators. Florida’s Fish and Wildlife Conservation Commission states, “Even one artificial light source can disrupt normal flight activity, long distance migrations, or even attract insects that don’t normally move from their habitat.”

As for human health, both physical and mental health are affected by light pollution. Studies (from Harvard and the University of Toledo) show that overexposure to blue light (especially at the wrong times of day) can result in higher risk of chronic illnesses and diseases — such as heart disease, diabetes, depression, mood disorders, insomnia, weight gain, and even different types of cancer. Why? Because blue light, or junk light, causes your body’s natural circadian rhythm to get thrown off course. In other words, rather than following cues from the sun to regulate bodily functions, you’re body is essentially in a state of jet lag. You need natural blue light from the sun during the day, but as the sun descends, your body should naturally begin producing melatonin so that you can prepare to rest for the evening. The key here is that blue light directly influences the body’s ability to produce melatonin production at night, which typically results in having a harder time falling asleep and getting high quality rest. Lack of sleep makes people irritable, and affects one’s ability to show up in the world as their best self.


So, what can you do to protect yourself, wildlife and the environment around you? First, try to turn down the lights as the sun descends below the horizon. Be mindful of the lighting outside of your home so that you don’t disrupt the animals and insects nearby. There are wildlife-friendly lighting options available, red bulbs are the most ideal to purchase because red has a very short wavelength and doesn’t travel very far. As you’re winding down for bed at night, try to limit your usage of digital devices that have bright LED screens and dim the lights in your bedroom. You could even cover the pesky little blue and green power source lights on your tv, computer monitor or power cords to help darken your bedroom. Blackout curtains are also highly encouraged to prevent light exposure from the streets lights outside of your window from entering your bedroom at night. A cave-like room at night will help you sleep better at night and perform better during the day. 🙂

Junk Light, Disrupted Sleep, and Your Health

Exposure melatonin disrupting junk light can have have effects on many aspects of your health

Sleep cycle disruption

Junk light exposure when traveling can disrupt your circadian rhythm. Long-term exposure to light at night which accompanies shift work is listed as a probable carcinogen by the World Health Organization. Light at night has shown to be highly associated with significantly the risk of hormone specific such as cancers of the breast and prostate.


The flickering wavelength of light associated with LEDs and compact fluorescent lights emit blue light that inhibits melatonin production but also create a unique glare that impacts your retina causing eye strain, headaches, and physical and mental fatigue.

Weight Gain

Red light and darkness move leptin and ghrelin into patterns that are (context dependent) associated with less hunger, while blue light does the opposite and can move both into patterns associated with more hunger.

Anxiety/Depression & Depression

Increase in cortisol, the stress hormone, due to circadian disruption. Memory recall is impaired with consistent sleep deprivation and may leave you distracted and not performing your absolute best.

The Importance of Melanopsin Cells

The Key to Better Sleep

detects blue light

The melanopsin cells detect blue light it tells your brain that it is “daytime” and less melatonin is produced.

sending signals to your brain

The signals to your brain to alert brightness and for the brain to increase or suppress the sleep hormone, melatonin.

Light Source

Melanopsin cells can’t differentiate the blue light that occurs naturally form the sun from the junk light emitted from your computer monitor.

Start Optimizing Your Life

Harness Your Biology to Fight Junk Light

Your body requires some blue light at the right time of day and from the right sources. That’s why we created TrueDark® Sleep Technology that gives you 24-protection from junk light day and night.

Use TrueDark® Twilights When You’re Ready for Sleep

Stop Junk Light with TrueDark® Twilight technology that frees your hormones and neurotransmitters to do their best work.

When the sun goes down, blue light isn’t the only junk light that can disrupt our sleep cycle and more than blue blockers are needed. TrueDark® Twilight is the first and only solution that is designed to work with melanopsin, a protein in your eyes responsible for absorbing light and sending sleep/wake signals to your brain. Without melanopsin, melatonin can’t be accessed.

When you wear your Twilights for as little as 30 min before bed you prevent your melanopsin from detecting the wrong wavelengths of light at the wrong time of day. This supports  your circadian rhythm and helps you fall asleep faster and get more restorative and restful sleep.

glasses to help with computer eye strain computer glasses

TrueDark® Daywalkers for Your Waking Hours

The highly advanced lenses in TrueDark® Daywalkers operate on a more advanced level than traditional blue blockers.

Blue light emitted from the sun helps regulate our sleep/wake cycle. However, in today’s world, we’re exposed to an overabundance of blue light, or junk light from artificial light. This includes hours spent in front of  TVs, phones, and computers. It also includes time spent in artificial man made light with LEDs and fluorescent lights. Even if we’re simply reading a book, we’re doing that in artificial light which emit dramatically more blue light than the sun. That overexposure to junk light during the day has a dramatic impact on our neurotransmitters and hormones that are responsible for quality sleep.

The Only 24-hour Solution for Your Eyes

Increase Your Mental and Physical Performance

Translate »