The National Electrical Manufacturers Association (NEMA) has published NEMA SSL 4 Retrofit Lamps: Minimum Performance Requirements.

This publication applies to integral Light Emitting Diode (LED) lamps, which are defined as a lamp with LEDs, an integrated LED driver, and a base that meets appropriate American National Standards (ANSs) and is designed to connect to the branch circuit via a lampholder/socket that meets appropriate ANSs. The criteria applies to both integral LED lamps of non-standard form, and those intended to replace standard general service incandescent lamps, decorative (candelabra style) lamps, and reflector lamps.

The contents and scope of SSL 4 may be viewed at www.nema.org/stds/ssl4.cfm.  A hard or electronic copy may be purchased for $45 by visiting global.ihs.com or contacting IHS by phone at 800-854-7179 (U.S. only) or 303-397-7956 (international).

NEMA is the association of electrical equipment and medical imaging manufacturers, founded in 1926 and headquartered in Arlington, Virginia. Its member companies manufacture a diverse set of products including power transmission and distribution equipment, lighting systems, factory automation and control systems, and medical diagnostic imaging systems. Worldwide annual sales of NEMA-scope products exceed $120 billion.