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ROSSLYN, VA- Prominent codes and standards have recently eliminated minimum illuminance requirements for exit signs, raising serious concerns for the prompt and safe egress from building environments in case of an emergency, says the National Electrical Manufacturers Association (NEMA).
In response, the association's Lighting Systems Division has released a technical paper, Exit Sign Brightness for Visibility and Safety, which provides a review of the various exit sign technologies and their brightness. The document provides a brief background on life safety codes and standards requirements and reviews exit sign technologies relative to brightness. It also summarizes visibility research results and sets forth recommendations for the visibility of exit signs to promote safety.
Experts say major codes and standards developers are moving away from requirements for measurable test ...