You are now visiting our Global professional lighting website, visit your local website by going to the USA website

More brands from

Lighting in




Negative sensation caused by excessive and uncontrolled brightness in the visual field


The degree of glare not only depends on the luminaire but also the positon of the observer, the room dimensions and reflections of the surfaces. 

Unified glare rating (UGR) - measure of the glare in a given environment

  • UGR data should be provided by the manufacturer of the luminaire often found in the specifications or datasheets of the luminaire (e.g. in an office, the luminaires should have an UGR ≤ 19)



Car park1

Direct glare from windows and luminaires.

Car park2

Reflected glare on computer screen from ceiling luminaries.


If there are no luminaire specifications available you can also observe and experience the glare:

  • Is the luminaire causing you an unpleasant feeling to your eyes?
  • Is it blinding you?


Discomfort glare  it is difficult to see an object


Disability glare reduced visual performance




Previous      Next



December 6

Light in Space

Presented by Maarten Jamin, Vesna Petresin, Gernot Oberfell


January 17

Light Pollution - The Effects on Animals and Humans

Presented by Kamiel Spoelstra, Steven Lockley


February 20

A Fine Dining Experience (The Art of Consulting as a Lighting Designer)

Presented by Dr. Emrah Baki Ulas


March 21

Fundamental and Inspirational Light

Presented by Enrique Garcia-Carrera

Paul Traynor
Paul Traynor
Marlyn Zelkowitz

We're talking about