Feb 2026

Darkon is now issuing combined up/down IES files.

Within this Zip file you will find both the separate Direct and Indirect files, as well as combined up/down files.

Please note - in the real world there are two light sources - up and down - with a displacement between the two corresponding to the height of the fitting. However, the IES file format can only simulate one single photometric centre.  This may lead to calculation errors, particularly on the Up/Indirect component, when the luminaire is placed close to a ceiling. When using close to a ceiling, we recommend using independent direct/indirect files to correctly model the photometric centres. The Indirect file will need to be flipped upward.




