About Rhythm
Why we exist
We weren't built for dim rooms and glowing screens.
For most of human history, sunlight guided every heartbeat, every breath, every rhythm of our lives. But modern life has dimmed that connection — offices, apartments, and phones have replaced the sky.
We now spend about 90% of our time indoors, under light that's too weak by day and too bright at night.
When you feel tired at noon and wide awake at midnight — when winter weighs heavy and summer feels like relief — that's your body calling out for light.
Millions of Americans — and hundreds of millions more around the world — suffer because they simply don't get enough.
It doesn't have to be this way.
Light, measured
The same light density as direct sunlight — indoors.
Light and your body clock
Deep in your brain, a master clock keeps your body on a roughly 24-hour cycle: your circadian rhythm. Light resets it every day. Cells in your eyes that carry melanopsin, a light-sensitive protein, read how bright your world is and tell the clock when the day has begun.
That clock times your hormones. Cortisol rises in the first hour after you wake, and bright morning light lifts it further.1 Melatonin works the other way: it stays low through the day and rises in the evening as the light fades, readying your body for sleep.
Cortisol gets called the stress hormone, but its morning rise is what gets you going: alertness and focus for the day ahead. Melatonin is your body's signal for night, helping you fall asleep and sleep well. Bright mornings and dim evenings keep both on time.2, 3
Sources
We build the Light Machine — a powerful, precise instrument that brings the full strength of the sun indoors. Our mission is simple: to ensure every person sustainably receives the light they need to feel happy, healthy, and well.
Because when you live in light that truly nourishes you, everything changes.
Who we are
Rhythm was founded by Harrison Lin — a mechanical engineer, product designer, and sculptor who began this work during the long, dark months of the pandemic.
During this time, he felt the heaviness, the disconnection, the slow fading of energy and joy. To feel better, he built his first prototype. It wasn't perfect, but it worked.
From that beginning grew a team of designers and engineers united by a simple belief: that light is not just something we see, but something we feel.
Hand-built in San Francisco
Each Rhythm Light Machine is hand-built in San Francisco from aircraft-grade aluminum with a custom powder-coat finish that looks and feels like fine furniture. Every part is chosen for performance and longevity — not a disposable gadget, but a lifelong piece of light.
Every Rhythm light comes with a 2-year warranty for the original owner. If anything goes wrong in that time, we'll repair or replace it, free of charge — no hassle, no fine print.
Our message to you
If we're being honest, we don't want you to use our product.
Seriously.
If you want to feel better, go outside.
Let the sun warm your face.
Breathe.
Touch the earth.
It's the most natural way to feel better — and it's free.
But we also know that not everyone gets that chance.
Maybe you're stuck indoors sunrise to sunset. Maybe it's a dark and gray winter. Maybe you're just too tired to go out.
We get it.
That's why Rhythm exists — to reconnect people with real, nourishing light their bodies and minds were designed to thrive on.
Go outside whenever you can.
For all the times you can't, Rhythm is here for you.
