IES Lighting Ready Reference App

Free from the IES
The IES Ready Reference App, produced by the Illuminating Engineering Society is now available as a free download.
Now available in English, French, AND Spanish!

The App provides:

  • Core lighting knowledge, including values from illuminance tables
  • General knowledge information, assembled from The Lighting Handbook, 10th Edition and IES standards
  • Simple calculator for quick and easy basic lighting and energy and economic calculations
  • Search feature allowing you to find the information you want
IES Ready Reference AppIES Ready Reference App
Download from Apple StoreDownload from Google Store
The IES App is compatible with any Android or iOS smart phone or tablet.

Please send questions and comments about the Ready Reference App to