IES File - opening and understanding

Did your computer fail to open an IES file? We explain what they are used for and recommend software that we know can open or otherwise handle your .IES files.

What is an IES file?

The Illuminating Engineering Society or IES file type is primarily associated with photometric data files. Illumination Engineering Society of North America (IESNA) created the standard file format for electronic transfers of photometric data.

Photometric data files are saved as .ies files, which are composed of light quantities and measurements. They depict lighting intensity and luminosity. IES files are records of measurement of light in terms of perceived brightness to the human eye. They are commonly used by engineers, architects, and 3D game makers.

The .ies files are useful for simulating lighting systems before they are installed on different infrastructures. Furthermore, IES files are likewise useful for the examination of light source illumination for outdoor sites like roadways and parks. It helps engineers and architects determine what light fixtures are best for a specific structure. And since .ies file deals mainly with lighting and photometry data, many 3D programs can open and support this file type in creating computer- aided design projects.

How to open IES files

You will need a program compatible with the specific file you are trying to open, as different programs may use files with file extension IES for different purposes.

While we have not verified the apps ourselves yet, our users have suggested 7 different IES openers which you will find listed below.

Suggest another file format using extension IES

While we know of one file format using the .IES file extension, there may be more. It is widespread that different programs use files with the same file extension for very different types of data. Please let us know if you are aware of a different kind of .IES file.

Various viewers for this file format

These apps are known to open certain types of IES files. Remember, different programs may use IES files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Photometric Toolbox Professional EditionPhotometric Toolbox Professional EditionUser submitted
IES viewerIES viewerUser submitted
Photometrics ProPhotometrics ProUser submitted
PhotometricViewerPhotometricViewerUser submitted
Application IESViewerApplication IESViewerUser submitted
modomodoUser submitted
modo sp4modo sp4User submitted
We have not verified any software that we know for certain will work with IES-files on Mac. If you know one, please use the 'Suggest a program' link below and tell us about it!
We have not verified any web services that we know for certain will work with IES-files. If you know one, please use the 'Suggest a program' link below and tell us about it!