NEMA LSD 55:2017

Introduction Outdoor lighting at night provides many obvious and accepted benefits to society, including the ability to safely travel on roadways, facilitate commerce, enable outdoor activities such as recreation, provide for the lighting of architecture and landmarks, and provide for social and personal security. NEMA Lighting Systems Division members have significant concerns with published materials that portray any type of outdoor lighting as contributing to a negative nighttime environment without giving due consideration to all the factors involved and the existing body of research. The views of the Lighting Systems Division members are shaped by the principle that, regardless of the issue, public policy that relates to technical issues should always be based on sound scientific evidence and not built onspeculation or conjecture.