Common white LED fixtures, which surround us in the vast majority of interiors, have a fundamental physical flaw that is rarely discussed – the so-called “cyan gap”. This term describes a significant dip in their light spectrum in the wavelength range of approximately 470 to 500 nm, corresponding to cyan and azure colors.
Why does this gap occur?
The cause lies in the way “white” light is mass-produced. A blue diode (with a peak around 450 nm) emits light onto a layer of yellow phosphor. The phosphor absorbs part of the blue light and converts it into longer wavelengths (green, yellow, red). The resulting mix appears white to the visual system, but it is actually missing a crucial part of the color spectrum – precisely in the cyan range, which standard LED phosphors do not emit.
Biological impact of this physical flaw
This “hole” in the spectrum might seem like only an aesthetic defect, if it weren’t critically important for the human body. Around 480 nm lies the peak sensitivity of our third photoreceptor in the eye – melanopsin. This receptor is not used for vision but for regulating our internal biological clocks (circadian rhythm). It is part of the non-visual system of the eye (NIF – Non-Image Forming).
Light from a common LED provides our brain with a very weak, incomplete, and confusing signal for daytime activation. Even though the light appears bright to us, for our non-visual system it is “dark” and lacks the crucial information needed to properly regulate hormonal cycles, leading to fatigue and poorer sleep.
Spectrasol advantage: Full spectrum without gaps
Our procognitive lighting is developed using advanced technologies (e.g., specialized LED chips and sophisticated phosphors). Our goal is not just to create white daylight but to replicate as faithfully as possible the physical and biological essence of sunlight. Our light spectrum is therefore continuous, balanced, and importantly, without a cyan gap like natural sunlight.
This ensures that the brain receives complete and accurate “light information” throughout the day, forming the physical basis for all subsequent benefits – better health, productivity, mental well-being, quality sleep, and eye protection.
Translated using AI
