Parameters affecting the switching life in HPF self ballasted lamps

Abstract

This paper explores the impact of high power factor (HPF) on the life of self-ballasted lamps or commonly referred as CFLs. In HPF CFLs the lamp current crest factor is usually very high. From the research work done so far it is well understood that the high current crest factor is detrimental for the life of lamp electrodes. The work done in this paper provides information about the filament current crest factor with corresponding change in electrode temperature. The lamps used for these experiment are switched on and off with sufficient time given to cool the lamp electrodes. The degradation of the lamp life with respect to filament current crest factor and electrode temperature are plotted and analysed. The best fit is obtained for the set of experiments conducted. From the set of results obtained a mathematical equation is derived. This work serves an important aspect of HPF circuitry and their corresponding drawback in addressing lifetime issues of CFLs.