The Relux k-value calculator was developed for experts in the assessment of obstrusive light.

The program refers to following guidelines:

• Hinweise zur Messung, Beurteilung und Minderung von Lichtimmissionen der Bund/Länder-Arbeitsgemeinschaft für Immissionsschutz (LAI) 2012
• ÖNORM O 1052:2012 „Light pollution ― Measurement and evaluation“

The k-value calculator enables the evaluation of glare by obstrusive light by using a dynamic result window.

https://relux.com/kcalc