IES LM-71-14 PDF Download

The "IES Approved Guide: Photometric Measurement of Tunnel Lighting Installations" is a standard developed by the Illuminating Engineering Society (IES) that provides guidelines for measuring and reporting the photometric characteristics of tunnel lighting installations. The guide aims to ensure that there are consistent and reliable procedures in place for evaluating the performance of tunnel lighting systems.

The standard refers to the ANSI/IES RP-22-11, which defines the factors that determine the performance of tunnel lighting installations. This indicates that the guide aligns with existing industry standards and builds upon them to provide more specific measurement techniques for tunnels.

Key aspects covered in the standard include the measurement of luminance and illuminance, which are crucial factors in evaluating the quality and effectiveness of tunnel lighting. The guide also provides instructions for determining the appropriate locations for taking these measurements in tunnels.