THE HUMAN BIORHYTHM
and what role the inner clock plays
Over millions of years, the human body has become accustomed and adapted to the changing seasons and...
Tag: Light
Basic terms of lighting technology
BASIC LIGHT-TECHNICAL TERMS AND THEIR MEANING
Consumers often stumble over basic light-technical terms. But if you don’t know what...
International Commission on Illumination
WHO IS THAT AND WHAT DOES IT DO?
Who is the CIE?
The tasks of the CIE, the International Commission on Illumination, are manifold. However, the...
About the invention of the light bulb – and who it really was
THE LIGHT BULB
What would we do today without artificial lighting? Probably grope in the dark – literally. Artificial light is everywhere, it...
THE DISPLACEMENT FACTOR
WHAT IS THE DISPLACEMENT FACTOR?
On most light source packaging we find the indication “Displacement Factor”. But very few...
The CRI
What is the CRI – and what does it tell about LED lamps?
DEFINITION
CRI – the Color Rendering Index is the measure of the color...