Circadian Science, Explained
Research-backed articles on sleep, light, display health, and building better habits around your biological clock.
Why Night Shift Isn't Warm Enough (And What Actually Works)
You dragged the warmth slider all the way to the right. You're still wide awake at 1 AM. Here's why Night Shift doesn't do enough — and what the science says you need instead.
Read article →Why Apple's Night Shift Isn't Enough
Night Shift is better than nothing. But a fixed timer and a simple warm tint cannot replicate what solar-phase tracking does for your circadian clock. Here is what the research shows.
Read article →Blue Light and Sleep: What the Research Actually Says
The link between short-wavelength light, melanopsin activation, and melatonin suppression is well-established. We walk through the key studies and explain the underlying biology.
Read article →Melanopic EDI Explained: Why Lux Is the Wrong Metric
The CIE S 026:2018 standard introduced a better way to measure circadian light exposure. If you only know about lux and color temperature, you are missing half the picture.
Read article →The Morning Light Problem Nobody Talks About
Blocking blue light at night is only half the equation. Morning light is what anchors your SCN to the solar day - and most people who work from home are chronically deficient.
Read article →PWM Flicker and Headaches: The Hidden Cause of Screen Fatigue
Most laptop and monitor backlight dimming uses pulse-width modulation, which rapidly switches the backlight on and off. For many people, this invisible flicker causes headaches and eye strain.
Read article →Eye Health for Developers: A Practical Guide for Late-Night Coders
Developers spend more screen time than almost any other profession, often late into the night. Here is a research-grounded toolkit for protecting your eyes and your sleep without breaking your flow.
Read article →The 20-20-20 Rule: Why Most People Fail at It (and How to Fix That)
The American Academy of Ophthalmology recommends looking at something 20 feet away for 20 seconds every 20 minutes. Simple in theory. Almost nobody does it consistently. Here is why - and what actually works.
Read article →Your Circadian Rhythm Is Running Your Productivity (Whether You Know It or Not)
Sleep is the obvious link, but circadian timing affects cognitive performance, mood, metabolism, and immune function throughout the day. The research is deeper than you might think.
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