IES

File Format
Name	IES
Ontology	Electronic File Formats Scientific Data formats IES
Extension(s)	.ies
PRONOM	fmt/1288

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.

File Identification

IES files are ASCII text. Files begin with IESNA:LM-63-(year). Examples LM-63-1986, LM-63-1991, and LM-63-1995, and LM-63-2002

Except the earliest version which uses the ASCII: IESNA91

Links

• Wikipedia:Illuminating_Engineering_Society_of_North_America
• ANSI/IES LM-63-02/R08
• Parsing The IESNA LM-63 Photometric Data File
• ERCO data files
• LightLouver Information sheet