The Light Health Company
Rhythm builds the Light Machine — an instrument that brings the full strength of the sun indoors.
Set your circadian rhythm, improve your daytime energy levels, and sharpen your focus with real, nourishing light.
$2,400 · Ships November 2026
Your Apple Watch already measures the daylight you're in. The Rhythm app turns it into one Light Score a day, anchored to your own sunrise and sunset — and controls your Light Machine over Wi-Fi.
Free · iPhone & Apple Watch
Technology
Rhythm machines are purpose-built to match the intensity of sunlight. Every detail exists to deliver the melanopic light your circadian system reads as daytime.
At the core of each system is the Rhythm light engine — a compact, high-output assembly that produces up to 60,000 lumens at 480 watts peak power at 90+ CRI, reaching 100,000 lux at 50cm from the source — the same light density as direct sunlight.
We selected a warm 2700K color temperature to reproduce the feeling of golden hour — the soft, amber light that signals sunrise and sunset.
Better cooling means more light. A copper vapor chamber draws heat away through phase-change conduction, while forced-air cooling with feedback control keeps temperatures stable under load. This efficiency allows higher luminous output, lower stress, and sustained performance over time.
Hand-built in San Francisco from aircraft-grade aluminum (5052) with a custom powder-coat finish. Premium high-CRI LEDs, industrial-grade power supplies, and precision cooling designed to run safely and silently for years.
The Rhythm Dial
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A smooth, tactile controller. Sweep the dial and the room follows — no clicks, no steps, just light rising the way the sun does.
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Set your light to rise with your morning and settle in the evening. Your space keeps a rhythm even when the sky outside doesn't.
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The dial keeps a quiet record of your light: how long it ran today, and how your days add up across the week.
Who we are
Our mission is simple: to ensure that every person receives the light they need to feel happy, healthy, and well.
Because when you live in light that truly nourishes you, everything changes.
Our story →
