Compatibility testing of fluorescent lamp and ballast systems

The rapid growth in the use of electronic ballasts, for fluorescent lighting systems, and the corresponding increase in the number of new products and new manufacturers in the market, has raised a number of questions regarding the compatibility of the lamps and ballasts used in fluorescent systems. Because many of the new products start and operate lamps differently than previous products, the relevant ANSI requirements may no longer be adequate for addressing compatibility concerns. The impacts on system performance of the newer products has not been well established. This paper reports the results of a parametric study designed to test key hypotheses regarding the impacts of key ballast parameters on fluorescent lamp life. In this study, samples of four-foot T8 fluorescent lamps were operated on duty cycles of five minutes on and five minutes off, using seven different ballast types. The results of the study indicate which parameters seem to have the biggest effect on lamp life, and can be used in establishing new performance standards for fluorescent systems.