Files with ies extension are special photometric data files saved in a format developed by IESNA (Illumination Engineering Society of North America).

Detailed description

Software that open ies file

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IES file extension - IESNA photometric data file

What is ies file? How to open ies files?

File type specification:

Various data file type icon Various data file type

The ies file extension is used for a special photometric data format, created as standard by Illumination Engineering Society of North America (IESNA). It is the de facto industry standard file format for electronic transfer of photometric data.

A typical ies file basically contains the measurement of distribution of light (intensity) stored in ASCII format

This format is used by many 3D programs, that can use the photometry data.

Updated: March 28, 2024

The default software associated to open ies file:

ZEMAX picture or screenshot

ZEMAX Development Corporation logoZEMAX  Microsoft Windows software

Company or developer:
ZEMAX Development Corporation

ZEMAX is designing software for optical engineers used to create lens design, illumination, laser beam propagation, stray light, freeform optical design etc.

Help how to open:

Some 3D graphic programs, like 3D Studio Max are able to import the phonometric data from *.ies files.

How to convert:

It is likely that IES format can be exported to other files that contain photometry data.

Find conversions from ies file:

ies to jpg

ies to ldt

ies to max

ies to obj

ies to pdf

ies to rfa

Find converter to ies file type:

ldt to ies

ltd to ies

pdf to ies

Related links:

Illuminating Engineering Society website

List of software applications associated to the .ies file extension

Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open ies file, edit ies file, convert ies file, view ies file, play ies file etc. (if exist software for corresponding action in's database).

Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting ies files.

Software that open ies file - IESNA photometric data file

Programs supporting the exension ies on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about listed programs for open ies file action.

Microsoft Windows:

Main software associated with ies file by default:
Other suggested software:
Revit small icon Revit
3ds Max (3D Studio Max) small icon 3ds Max (3D Studio Max)

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