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.
The full spectrum, visible and invisible — the light we evolved with.
That question has now been answered by independent university research. 1,2
A measurable effect on how people perform in real working environments.
Study details ›A measurable physiological response to restored near‑infrared light.
Study details ›New Scientist, August 2026 — on how energy‑efficient lighting removed near‑infrared from indoor life, what that means for mitochondria and metabolism, and the research at UCL.
Full study summaries on the research page.