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 file extension is .ldt. The format was proposed by Axel Stockmar (Light Consult Inc., Berlin) in 1990. The format is the European equivalent to the IES file format specified in IESNA LM-63.^[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.

Filename extension

.ldt

DevelopedbyAxel Stockmar (Light Consult Inc.)

Initial release1990; 36 years ago (1990)

Latest release

2
1998; 28 years ago (1998)

Quick facts Filename extension, Developed by ...

EULUMDAT
Filename extension	.ldt
Developed by	Axel Stockmar (Light Consult Inc.)
Initial release	1990; 36 years ago (1990)
Latest release	2 1998; 28 years ago (1998)

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