Most white LED bulbs use strong blue light around 450 nanometers. That’s the kind of light that signals your biology that it’s daytime. Even bulbs that look warm can have this hidden blue spike, which can block melatonin in the evening and confuse your body’s rhythm unless the light is filtered or dimmed way down.
Science that Restores
Our lights are built to support how your body naturally works – using proven science and over 500 patents.
By delivering the right kind of light at the right time, we help your body restore its rhythm – so you can sleep better, think clearer, and feel more balanced.
Humans Evolved Under Natural Light
For thousands of years, the sun was our only guide – its rising light sparked energy, and its fading glow signaled rest. Today, artificial light surrounds us, but our internal clock still relies on the sun’s natural signals to stay in sync.
Key biological pathways affected by light:
- ipRGCs: Light-sensitive eye cells that tell your brain what time it is.
- SCN: The brain’s master clock that sets your body’s daily rhythm.
- Pineal Gland: Uses timing signals to control melatonin and your sleep-wake cycle.
We’ve Moved Indoors.
But Our Biology Hasn’t.
We spend nearly all our lives indoors, cut off from the sun’s natural signals. Artificial light stays the same all day, it confuses our brain and misguides our biology.
Korrus uses patented spectral engineering to restore the natural cues missing from indoor light. Our circadian technology automatically shifts light across the day to align with your biology, helping regulate sleep, energy, and cellular repair.
When Light Disrupts Your Clock, Everything Suffers
The harm to our health is not theoretical; it’s backed by decades of circadian science.
Image Credit: SatchinPanda, Professor at the Salk Institute and Center for Circadian Biology at UC San Diego
We Don’t Need Better Workarounds. We Need a Better Light.
Blue Blockers Fall Short
They filter light, but the wrong signals still reach your brain.
Sleep Without Rhythm
Pills force rest, but they don’t repair your body’s internal clock.
Track What Matters
Real recovery starts with light that keeps your body in sync.
Blue Blockers Fall Short
A Partial Filter
They filter light, but the wrong signals still reach your brain.
Sleep Without Rhythm
A Chemical Override
Pills force rest, but they don’t repair your body’s internal clock.
Track What Matters
What We All Want
Real recovery starts with light that keeps your body in sync.
Melatonin: The Body’s Night Shift Powerhouse
Melatonin does much more than help you sleep. It’s a master signal for your entire evening biology. When light fades, melatonin tells your body it’s time to rest, repair, and protect. But most of us are unknowingly blocking this natural evening process – just by turning on the lights.
Two light sources. One big difference.
One group was exposed to circadian light (Korrus Bulb). The control group was exposed to standard LEDs.
The result?
68% more melatonin was produced earlier in the evening, which equates to better sleep and feeling well rested in the morning.
Circadian Science FAQs
Why do standard LED bulbs interfere with sleep?
What is circadian lighting?
Circadian lighting changes throughout the day to match how your body naturally works. In the morning and daytime, it includes more blue light to help you feel awake and alert. After sunset, it removes that blue light so your body can start getting ready for sleep. It still keeps a soft touch of violet light so the room feels gentle and calm, while your body makes melatonin – the hormone that helps you fall asleep.
How does light affect my biological clock?
Your eyes have special cells that can sense blue light. This kind of light helps you wake up in the morning by boosting your focus and telling your body to make more cortisol – the hormone that helps you feel alert. But if you see blue light at night, it can block melatonin, the hormone that helps you sleep. That’s why the timing and color of light are both important for keeping your body on a healthy daily rhythm.
What are circadian rhythms, and why do they matter?
Your body runs on a 24-hour clock called a circadian rhythm. It helps you know when to wake up, go to sleep, and stay healthy. There’s a tiny part of your brain that acts like your body’s timekeeper. It needs blue light in the morning to stay on schedule. When your rhythm is in sync, you feel awake during the day and sleepy at night. But if it gets off track, it can make you tired, moody, or even affect your health.
What type of light disrupts sleep the most?
Blue light (between 440 and 495 nanometers) is the one that gets in the way of melatonin production – the hormone that helps you sleep. Even a small amount of blue light at night can fool your body into thinking it’s still daytime. That makes it harder to feel sleepy. But violet light (around 420 nanometers) doesn’t get in the way of melatonin as much, especially if your eyes have already been in light for about 30 minutes.
Is blue light always bad for me?
Not during the day. Blue light is great for you in the morning and through twilight hours as it helps you feel awake, think clearly, and keep your body clock running on time. But at night, blue light can block melatonin – the hormone that helps you sleep. So it’s helpful in the morning, but it gets in the way in the evening.
