Dec 13, 2021

On October 29, 2021, NEMA published LS 20001-2021, White Paper on Unified Glare Rating (UGR), which explains the original intent of the Unified Glare Rating (UGR), its proper uses, and common misuses of the Standard. The Illuminating Engineering Society supports the underlying science contained within this document and its conclusions regarding the use and limitations of the Unified Glare Rating.