The National Electrical Manufacturers Association (NEMA) has published LL 9-2009 Dimming of T8 Fluorescent Lighting Systems.
This new standard is the first coordinated guidance from industry on the dimming of T8 fluorescent lighting systems; LL 9 covers ranges between 100% and approximately 35% output (60mA lamp current). The publication was a result of discussions between numerous manufacturers and end-users as well as years of data gathering, testing, and analysis.
LL 9 may be downloaded at no charge, or a hardcopy purchased for $36, by visiting
www.nema.org/stds/ll9.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.
