Vertical illuminance on a horizontal plane

[JKerpels]

I was wondering the following: if a place a horizontal calculation plane on a project, and select the vertical illuminance parameter to be calculated on that plane, what exactly do the results mean? Since the plane is perfectly horizontal, there is no vertical component in the calculation plane? The resulting numbers do show a meaningful result, but I can't figure out what exactly is calculated in this scenario.

Thanks,
Joost

[T.Magenheimer]

Dear Joost,

Please read the following article of our DIALux evo knowledge base to hopefully answer your question:

https://evo.support-en.dial.de/support/ ... ion-object

The arrows in the icons of the respective parameters point in the direction from which the light comes. The name of the parameter refers to the orientation of the calculation area.


Best regards
Your DIAL Support Team