NEMA LSD 23-2010 Recommended Practice - Lamp Seasoning for Fluorescent Dimming Systems.pdf

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1、NEMA Standards PublicationNational Electrical Manufacturers AssociationNEMA LSD 23-2010Recommended PracticeLamp Seasoning for Fluorescent Dimming SystemsA NEMA Lighting Systems Division Document LSD 23-2010 Recommended PracticeLamp Seasoning for Fluorescent Dimming Systems Prepared by Lighting Syste

2、ms Division National Electrical Manufacturers Association 1300 North 17thStreet, Suite 1752 Rosslyn, Virginia 22209 Approved May 21, 2010 The requirements or guidelines presented in this document, a NEMA Lighting Systems Division white paper, are considered technically sound at the time they are app

3、roved for publication. They are not a substitute for a product sellers or users own judgment with respect to the particular product discussed, and NEMA does not undertake to guarantee the performance of any individual manufacturers products by virtue of this document or guide. Thus, NEMA expressly d

4、isclaims any responsibility for damages arising from the use, application, or reliance by others on the information contained in these white papers, standards, or guidelines. LSD 23-2010 When new fluorescent lamps are installed in a dimming system, there is the possibility that some of the lamps wil

5、l exhibit flicker or other visual instabilities. This condition can be caused by residual impurities that may be present in a new lamp as a result of normal manufacturing processes or affected by initial mercury distribution in a new lamp. Operation of the lamps at the ballasts maximum light output

6、setting for a few hours should clear up any impurities or allow time for the mercury to distribute, eliminating any visual instability. An extensive study performed by NEMA of fluorescent dimming indicates that seasoning prior to dimming is not required to obtain rated lamp life. NEMA fluorescent la

7、mp manufacturers recommend that whenever flicker or instability is present, or, to reduce possible flicker or instability when new dimming systems are commissioned, lamps should be operated at the ballasts maximum light output setting overnight (approximately 12 hours). Overnight seasoning is partic

8、ularly recommended for optimum initial performance or installations where dimming performance (tracking, stability) is considered critical. References: 1. Dimming Fluorescent Systems Life Experiment, M. Duffy, R. Erhardt, P. Hakkarainen, R. Hunt, T. Leyh, R. Nachtrieb, C. ORourke, T. Poehlman, R. Ru

9、nkles, and H. Wolfman, Proceedings of the 11th International Symposium on the Science and Technology of Light Sources, May 2007, Shanghai, China. 2. Dimming Fluorescent Systems Life Experiment, M. Duffy, R. Erhardt, P. Hakkarainen, R. Hunt, T. Leyh, R. Nachtrieb, C. ORourke, T. Poehlman, R. Runkles,

10、 and H. Wolfman, IESNA Annual Conference, November 2008, Savannah, GA. Copyright 2010 by the National Electrical Manufacturers Association. 2NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION 1300 NORTH 17TH STREET, SUITE 900 ROSSLYN. VA 22209www.NEMA.orgTO ORDER ADDITIONAL NEMA STANDARDS VISITwww.gLObAL.IhS.cOM OR cALL 1-800-854-7179/1-303-397-79565612_0514TB