As lumen depreciation is a significant failure mode with LED lighting, it raises the question whether some older exit signs are still producing sufficient brightness to be visible in smoky conditions. This is the subject of a new study being undertaken by NALMCO in partnership with the Icahn School of Medicine at Mount Sinai in New York, and the topic of an article I wrote about the study for the January issue of ELECTRICAL CONTRACTOR.
Click here to check it out.
