Good Read you might be interested, also checkout relight scene in their web page very cool.
https://www.erco.com/guide/designing-wi ... gLaKfD_BwE
HANDBOOK
https://www.erco.com/download/content/3 ... ign-en.pdf
IES download
https://www.erco.com/guide/designing-wi ... gLaKfD_BwE
Cheers