KEY TAKEAWAYS
- New research confirms light directly impacts brainwaves and sleep quality
- Only TrueDark Twilight glasses changed brain activity
- Broad-spectrum blocking beats standard blue blockers
- Practical takeaway: sleep is a signal problem
Your Brain on Light: What a New Study Just Proved About Screen Time and Sleep — It’s Not Just Blue Light
Can’t sleep? Feel wired before bed? Your light might be the problem—and science just backed it up.
A brand-new brain study just confirmed something that’s been talked about for years: the wrong light at the wrong time keeps your brain in go-mode. And that means junk sleep, junk energy, and waking up already tired.
Let’s break it down simply — and show you what to do about it.
The Study: What Happened?
Researchers looked at how different types of glasses change your brainwaves.
40 adults sat in a calm room with their brain activity monitored using EEG (a tool that shows what your brain is doing in real time).
They wore three types of glasses:
1. No glasses
2. Clear placebo glasses
3. TrueDark twilights - twhich block the full spectrum of junklight — not just blue, but also violet and green (the kind from screens and LEDs).
And here’s what happened next.
The Results: Brain Waves Changed
Wearing the light-filtering glasses caused a big drop in beta brainwaves. That’s huge.
Beta brainwaves = alert, stressed, focused. Great for work. Terrible for sleep.
The glasses reduced that “on” signal in the brain — especially in the front (the part tied to decision-making and stress).
The other glasses? Did nothing.
Translation: These special lenses helped the brain relax.
Why This Matters (to Your Life)
Here’s the deal:
Every screen, lightbulb, and phone sends signals to your brain.
At night, those signals say: “Stay awake.”
That’s why you can’t fall asleep, feel wired, and wake up groggy.
This study proves: Block the wrong light, and your brain starts to relax. It’s like flipping the switch from wired to calm.
What Makes These Glasses Different?
Most “blue blockers” only block a small slice of light.
This study used broad-spectrum lenses — they blocked violet, blue, and green light. That’s the junk light trifecta. And that’s why they worked.
They didn’t just protect your eyes. They changed your brainwaves.
What To Look For in Glasses
If you're buying glasses for sleep, don’t settle for trendy amber lenses or clear blue blockers. Look for:
Filters that block violet, blue and green light
Lab testing or EEG data — not just marketing hype
Comfort for evening screen use (because you won’t wear what you hate)
The Bottom Line
Bad light = bad night.
This study proves it: the right glasses can help your brain come down from high alert. They don’t just reduce eye strain. They help signal to your brain: “It’s time to rest.”
Sleep Is a Signal Problem. Fix the Signal.
Junk light keeps your brain in stress mode. Smart light filters calm it down. It’s that simple.
Want to deep dive into the data? Explore the study here.