Free · 95 pages
Everything I know about light and your body clock — measured, not guessed.
Most light advice is copied from other articles. This is written from my own spectrometer: every target, every product, every number in it came off my bench.
Check your inbox — one click and it’s yours. You’ll get the book, plus a short monthly note on what I’ve tested and what the data showed. Unsubscribe anytime.
Inside the book
What’s actually in it
No filler chapters. Five parts, each one thing you can act on.
The numbers that matter
Melanopic EDI, the 250 / 10 / 1 targets, and why the lux and color-temperature figures on the box mislead you — with the measurements that show it.
A protocol for the whole day
Morning, daytime, evening, night. What to do, when, and the timing detail that decides whether any of it works.
Gear with the data attached
What I’d actually buy in every category, and the spectra behind each pick — including where two products with identical spec sheets aren’t remotely alike.
Who it’s for
Is it for you?
You’ll get a lot out of this if…
- You wake up tired no matter how long you slept
- Winter reliably flattens you
- You can’t fall asleep before 2am and can’t fix it
- You bought a SAD lamp or blue blockers and can’t tell whether they’re doing anything
- You work nights, or you’re about to fly somewhere far
It won’t help much if…
- You want a supplement stack — there isn’t one in here
- You have chronic insomnia. Light helps at the margins; the book says plainly what actually works and points you there
- You want quick tips. It’s 95 pages and it expects you to read them
Free · 95 pages
Send me the book
95 pages, free, no upsell inside. You’ll get one email now with the download, and a monthly note on what came off the bench.
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