Which organization’s standards are used for the Light Pollution Reduction credit?

The Light Pollution Reduction credit in the LEED BD+C rating system utilizes the standards established by the Illuminating Engineering Society (IES). IES is recognized for its expertise in lighting design and contributing guidelines to ensure appropriate outdoor lighting practices. The organization emphasizes the importance of reducing light pollution to minimize its impact on night skies, wildlife, and human health.

The standards developed by IES provide direction on how to specify, design, and manage outdoor lighting in a way that minimizes glare, light trespass, and skyglow. This is essential as it helps projects achieve a more sustainable approach to lighting, ultimately contributing to more environmentally responsible development.

While the other organizations mentioned play vital roles in various areas—like ASTM which focuses on material standards, FGI which deals with guidelines for health care and other settings, and the Cool Roofing Rating Council that measures roof products—none of them specifically address light pollution reduction as effectively as IES does. Thus, selecting IES as the organization referenced for this particular credit aligns directly with LEED's objectives in fostering responsible lighting practices.