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NEMA Publishes 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