Reduction factor

The reduction factor is a term from the area of ​​lighting technology and describes the process, reducing the illuminance.
The decisive factors for this can be the properties of surfaces, the distance to the light source, the height of the ceiling or shadow.
The reduction factor indicates how much percent the illuminance is reduced.
It is usually given as a percentage or as a decimal number.
The reduction factor is taken into account when planning lighting systems to ensure that the illuminance is sufficient in one room.