The National Electrical Manufacturers Association (NEMA) has published ANSI_ANSLG C78.901-2013 American National Standard for Electric Lamps—Single-Based Fluorescent Lamps—Dimensional and Electrical Characteristics. The standard outlines the physical and electrical characteristics of single-based fluorescent lamps, both self-supporting and those requiring auxiliary support, to ensure their proper application and interchangeability. The document can be purchased in electronic or hardcopy format on the NEMA website.