EULUMDAT

EULUMDAT is a data file format used for specification of photometric data especially intensity distributions from light sources such as lamps and luminaries.

The format was proposed by Axel Stockmar (Light Consult Inc., Berlin) in 1990.

[1] The data in an EULUMDAT file is usually measured using a goniophotometer.

The IES file format is more formally specified and many measuring instruments support both formats of file.

EULUMDAT files can be read with Photometry.

Example of an EULUMDAT diagram, generated by the software QLumEdit 1.0.1