New Procedure Available for Determining Luminaire Efficacy Ratings
A procedure for determining the target efficacy rating (TER) for luminaires under laboratory test conditions is described in a new standards publication available from the National Electrical Manufacturers Association (NEMA).
The publication, LE 6-2008 Procedure for Determining Target Efficacy Ratings for Commercial, Industrial, and Residential Luminaires, is intended as a guide to help in the selection of luminaires used in common indoor and outdoor lighting applications. TER does not address application characteristics such as color, uniformity, glare, or other considerations.
By establishing a rating for lumens delivered to a task (or target), TER allows planners and designers to compare solutions in terms of their overall energy and lighting effectiveness. TER, which includes criteria related to the optical control, is intended to be a metric, among many other considerations, to evaluate the energy effectiveness of a lighting installation.
NEMA LE-6 does not apply to luminaires for specialized applications, such as products intended to be aimed, accent luminaires, rough or hazardous-use luminaires, or emergency lighting. It supersedes the NEMA LE5, LE5A and LE5B standards for Luminaire Efficacy Ratings (LER).