For most of human history, artificial light after dark came from fire — dim, warm, rich in red and near-infrared. It closely matched the biological light environment that humans evolved under for hundreds of thousands of years.
The incandescent bulb was an improvement in brightness but remained a full-spectrum light source the body recognized as warm and relatively safe. Regulators phased it out across the U.S., EU, and globally in favor of LED technology. More efficient. Better for the grid.
Worse for people.
LED technology is not inherently harmful. But the way it has been engineered — almost entirely optimized for energy efficiency — created five compounding biological problems that the lighting industry has largely ignored.
1. Excessive Blue Peaks — Standard LEDs rely heavily on short-wavelength blue light to maximize output per watt. The result: harsh, unnatural light that overstimulates the nervous system and sends a strong "daytime" signal to the brain at any hour — suppressing melatonin, disrupting sleep.
2. No Near-Infrared — Sunlight and incandescent bulbs contain near-infrared wavelengths (700–1400nm) that interact with mitochondria and support cellular energy production. Standard LEDs produce virtually none. The natural counterbalance is simply absent.
3. Flicker — Many LEDs produce imperceptible flicker at 100–120Hz from poorly smoothed AC power. Research links it to eye strain, headaches, and nervous system fatigue over time.
4. Poor Color Rendering (CRI) — Sunlight renders color at CRI 100. Standard LEDs often score 80 or below — producing washed-out environments, unnatural skin tones, and a subtle but measurable impact on mood.
5. Excessive Brightness — Standard LEDs are engineered for maximum lumen output, not biological comfort. Even at reduced settings, the spectral imbalance remains. Spaces feel overstimulating when they should feel restorative.
After years of research and development — working closely with Dr. Alexander Wunsch, M.D., Ph.D., the world's leading expert in photobiology, and leading LED engineers — Ra Optics achieved something that previously didn't exist: a fundamentally new approach to LED light.
Using advanced phosphor technology, Lumios engineered a spectrum that:
The result is the Ra Incandescent LED™ — a light source that begins to resemble the biological qualities of incandescent light while retaining the efficiency advantages of modern LED technology. Not a compromise. An actual solution.
"Not just protecting people from harmful light — but creating better light, from the beginning."