Rosslyn , Va.—The National Electrical Manufacturers Association (NEMA) has published LSD 23-2010 Recommended Practice—Lamp Seasoning for Fluorescent Dimming Systems. This white paper, last published in 2002, was produced by the NEMA Lamp Section.

LSD 23 makes recommendations for the commissioning and maintenance of lamps in dimmable linear fluorescent lighting systems to reduce flicker and other visual instabilities that are sometimes encountered. This revision features updated guidance on lamp seasoning to reflect changes in dimming practices and systems.

LSD 23 may be downloaded at no charge by visiting www.nema.org/stds/lsd23.cfm.

This publication joins around 40 other white papers in the NEMA LSD series, which covers a range of lighting topics. Other parts of the series cover subjects like ballast disconnects, occupancy sensors, and photoluminescent exit signage. To view a comprehensive list of NEMA LSD white papers, go to www.nema.org/stds/lsd.cfm.


NEMA is the association of electrical and medical imaging equipment manufacturers. Founded in 1926 and headquartered near Washington, D.C., its approximately 450 member companies manufacture products used in the generation, transmission and distribution, control, and end use of electricity. These products are used in utility, industrial, commercial, institutional, and residential applications. The association’s Medical Imaging & Technology Alliance (MITA) Division represents manufacturers of cutting-edge medical diagnostic imaging equipment including MRI, CT, x-ray, and ultrasound products. Worldwide sales of NEMA-scope products exceed $120 billion. In addition to its headquarters in Rosslyn, Virginia, NEMA also has offices in Beijing and Mexico City.

Visit our website at www.nema.org