IES

Unknown

scientific

The IESNA LM-63 photometric data file is an ASCII text file commonly used by North American lighting fixture manufacturers to distribute photometric information about their products.

Identify it

Extensions	`.ies`
MIME types	`text/plain`
Signatures	`4945534e41` at byte 0
PRONOM	`fmt/1288`
Wikidata	`Q86914907`

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Sources

File Formats Wiki
PRONOM fmt/1288
Wikidata Q86914907

From Just Solve the File Format Problem (File Formats Wiki), PRONOM, Wikidata. Updated 2026-10-24.

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