Most people think of light in terms of brightness. Scientists think differently.
The colours we see are only a small part of it. At long wavelengths, red becomes deep red, then near‑infrared. Deep red begins to fade from view. Near‑infrared is entirely invisible.
That question has now been answered by independent university research.
A measurable effect on how people perform in real working environments.
Read the study ›A measurable physiological response to restored near‑infrared light.
Read the study ›