The National Electrical Manufacturers Association (NEMA) has published BL 2-2009 Energy Efficiency for Electronic Ballasts for T8 Fluorescent Lamps. The standard was developed by NEMA’s Ballast Section and revises the 2007 version.
BL 2 contains energy efficiency requirements for evaluating electronic ballasts designed for use with 4-ft. 32W T8 fluorescent lamps with a lumen output greater than or equal to 3100 lumens. It covers definitions, requirements and markings. Ballasts that meet these requirements are labeled NEMA Premium.
The contents and scope of BL 2 may be viewed, or a hardcopy or electronic copy purchased for $30, by visiting http://www.nema.org/stds/bl2.cfm, or by contacting IHS at 800-854-7179 (within the U.S.), 303-397-7956 (international), 303-397-2740 (fax), or global.ihs.com.
