World's First and Only
Circadian Light.
The Global Standard in Circadian Architecture
Products Built for Modern Commercial Spaces
Circadian Metrics That Matter
Most lighting metrics measure light output. Circadian metrics measure light’s biological impact.
mEDI
Melanopic Equivalent Daylight Illuminance
The international standard (CIE S 026) for measuring light’s impact on the circadian system. The single most important number for circadian lighting design.
Melanopic Ratio
Circadian Spectral Efficiency
How much of a light’s output falls in the circadian-active band (440–495nm). Higher during the day for alertness, near zero at night for melatonin production.
SPD
Spectral Power Distribution
The full wavelength profile. SPD reveals what a light source actually delivers across the visible spectrum, from violet to deep red.
OIO Circadian Range
From full circadian stimulus to near-zero melanopic impact
OIO commercial fixtures deliver the full biological range your occupants need: from bright, alerting morning light to warm, melatonin-safe evening light.
~250
mEDI · Morning
<5
mEDI · Night
We Don't Follow the Standard.
We've Raised It.
CIE S 026:2018
Compliant with the international standard for metrology of optical radiation for ipRGC-influenced responses to light.
WELL L03
Engineered to meet WELL Building Standard Feature L03 targets. Korrus’s Chief Scientist serves on the WELL Building Advisory Board.
UL Listed
All OIO commercial fixtures are UL listed for safety and code compliance in commercial installations.
DLC Qualified
Select fixtures are DLC qualified, enabling utility rebate eligibility and energy code compliance.
Measurable Biological and Cognitive Effects
When circadian lighting is deployed with the correct spectrum, intensity, and timing, it does more than illuminate a space. It alters physiology. In a year-long deployment inside a mission-critical control room, workers were exposed to biologically aligned light every hour of the day and night.
67%
reduction in safety-critical errors
50%
reduction in excessive sleepiness
43%
reduction in pain medication use
500+
patents
25K+
peer-reviewed studies
A Small Sample of Valued Customers
Ready to bring circadian light to your project?
Talk to our commercial team about specifications, pricing, and project support. We work with architects, lighting designers, and building owners.
Want to understand the science behind circadian lighting? Read about the science