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.IES File Extension

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File TypeIES Photometric Data File

DeveloperIlluminating Engineering Society
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Rare Uncommon Average Common Very Common
CategoryData Files


This file is saved in a binary format, which requires a specific program to read its contents.


Data file created in the standardized IES (Illuminating Engineering Society) photometric format; contains measurements of light and light quantities; commonly used to simulate lighting systems in buildings before they are installed.

More Information

IES files are also used to examine light source illumination for roadways and other outdoor sites. They are commonly published by lighting manufacturers.

Programs that open IES files
Microsoft Windows LogoWindows
Autodesk AutoCAD Architecture 2017
AutoDesSys RenderZone
LTI Optics Photopia
Musco Sports Lighting Lumen Micro
Updated 5/20/2016