Emergency Lighting Photometric Data helps determine the proper illumination levels the fixture provides. The objective when reading these, is for Lighting Designers to determine if an Emergency Light Fixture will meet the specifications required for the electrical project. Essentially, Photometric Data helps Lighting Experts see if the light produced is effecient. Having access to the Photometric Data allows you to understand the proposed lighting solution before purchasing light fixtures. Below you can access a full list of .IES (Illuminating Engineering Society) files for our Emergency Lights and Exit Lights.