What is IES file?

At the year of 1986, the IESNA (Illumination Engineering Society of North America) published the earliest standard file format for electronic transfer photometric data of lightings and luminaire (IESNA LM-63-1986: IES Recommended Standard File Format for Electronic Transfer Photometric Data), and it is quickly adopted by the lighting manufacturers   and lighting software developed companies in North America. This standard was revised until 1991, and add some keywords. And revised it again at the year of 1991 and 2002 respectively. Version 2002 has been approved by American National Standard Institute (ANSI), the IESNA LM-63-2002 (IESNA Standard File Format for Electronic Transfer Photometric Data) has been the North America unique applied photometric data format, the expanded-name is “*.ies”.

IESNA Standard Format

All the IESNA LM-63 format photometric data file must be named as “.ies”, adopts ASCII file format, the first line must be IESNA 91, IESNA: LM-63-1995 or IESNA: LM-63-2002 to show the file begins, and separate from other format.

According to LM-79, the goniophotometer should be output the IES file. Both the PG-1800 and PG-1600 series goniophotometers from Pego can output the IES file, freely to contact us to get more information.