ANSI Accredited Standards Committee 136 has developed ANSI C136.16-2014 American National Standard for Roadway and Area Lighting Equipment—Enclosed, Post Top-mounted Luminaires. Standard covers dimensional, maintenance, and light distribution features that permit interchange of enclosed, post top-mounted high-intensity discharge lamps, solid-state light sources, compact fluorescent lamps, and induction luminaires whose center of mass is approximately over the mounting tenon.