Industrial petrochemical facilities have predominantly used high-intensity discharge light sources and installation practices unchanged for several decades. Today, new lightemitting diode (LED)-based products are being developed, and there appear to be many advantages to this technology; however, caution is advised in its application. This paper examines LED lighting technology, standards, and available products along with design and application considerations. Moreover, presented are case studies of LED luminaire retrofits in existing facilities. This paper discusses the results of the studies as they relate to safety, environment impacts, capital and operating costs, design implications, and installation improvements.Index Terms-Color rendering index (CRI), environment, high-intensity discharge (HID), high-pressure sodium (HPS), light-emitting diode (LED), lighting, maintenance, safety.