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IES file description

China Pego Electronics (Yi Chun) Company Limited certification
China Pego Electronics (Yi Chun) Company Limited certification
Je viens de recevoir les doigts d essais, Je suis très satisfait , c est très bien

—— ESTI Formation

Dear Alice, The machines are working well now. Thank you for your support and patience to solve our problems and give us very useful suggestions in negotiation. Really a good cooperation.

—— TUV Rheinland Pvt. Ltd

Dear Penny, We really appreciate to buying from Pego Group for several years, all products come with good quality amd easy operation.

—— LIA Laboratories Limited

I have received the spring hammers, they are great!

—— BSH Group

Yes we got the probes and our engineers like them. Thanks.

—— Gamma Illumination Pty Ltd

the spring hammer looks good and works fine

—— Sigma Connectivity

This is to confirm the order has been well received and all is in good order. May I thank you for your very professional service.This has been a pleasant transaction.

—— Gallagher Group

절연강도 시험기 잘 받았습니다. 빠른 배송에 감사드리며 차후 또 다른 제품구입시 연락드리겠습니다.

—— 유진코퍼레이션에 황동익입니다.

I am sending this email to let you know that we receive the 2 vessels with the calibration certificate. I would like to thank you for the quality of the vessels and for your good work. I can’t wait to work with you on other topics.

—— Brandt France

we can confirm that it works very well! thank you for the good quality equipment.

—— PPC (Greece)

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IES file description
Latest company news about IES file description

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.

Follow the IESNA: LM-63-2002 till to “[TILT]=” is the keywords part, every keyword must add “[ ]”, the standard format as below:

  • IESNA: LM-63-2002
  • [Keyword 1] Keyword Data
  • [Keyword 2] Keyword Data
  • [Keyword 3] Keyword Data
  • ……
  • [Keyword n] Keyword Data
  • < lamp to luminaire geometry>
  • < number of tilt angles>
  • st horizontal angle>
  • nd horizonal angle>
  • ……

[Keyword] Keyword Data include below data:

[TEST] Test report number (must)

[TEST LAB] Photometric testing laboratory (must)

[ISSUE DATE] date that the manufacturer issued the IESNA: lm-63-2002 (must)

[MANUFAC] Manufacturer of luminaire (must)

[LUMCAT] Luminaire catalog number

[LUMINAIRE] Luminaire description

[LAMPCAP] Lamp catalog number

[LAMP] Lamp description (ie., type, wattage, size, etc.)

TILT= < filename> or INCLUDE OR NONE

This line is to describe if the output of luminaire or lamp would changes along with tilt angle, if no, it shows TILT=NONE, if yes, it indicates incline multiplier information:

1. if the angle and multiplier are included in the part of photometric testing, it shows TILT=INCLUDE.

2. if the angle and multiplier are excluded, it shows TILT=. The extend name of the file should be .tlt or .TLT. Example: MH100V.TLT.


Description as below:

< lamp to luminaire geometry>, this data is to show the lumniaire position in the lighting, as below:

 latest company news about IES file description  0

< angles>

The angle should be listed incrementally, and the range includes 00~900 or 00~1800

< multiplying factors>


1 7 0 15 30 45 60 75 90

1.0 .95 .94 .90 .88 .87 .94


< number of lamp>

< lumens per lamp>

< candela multiplier>

< number of vertical angles >

< photometric type (type A/type B/type C>


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Pego Electronics (Yi Chun) Company Limited

Contact Person: Ms. Penny Peng

Tel: +86-18979554054

Fax: 86--4008266163-29929

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