Phosphor-containing coating compositions and methods capable of changing the lumen maintenance characteristics of phosphor-containing coatings and fluorescent lamps that utilize such coatings. When the plunger assembly is at the non-operating position, a gap between main stationary and movable contacts is smaller than the sum of a gap between a pinion and an engine ring gear and the most-widely opened variable gap, which is defined between a drive mechanism and a moving shaft. More specifically, a method begins by executing queries, which includes accessing a set of data tables for each of the queries.