Abstract
In recent years, self-ballasted compact fluorescent lamps(SCFL's) have been downsized, then the internal electronic circuits receive greater heat stress. Here, we investigate two types of heat transfer network analyses. One is to calculate non-linear simulateneous equations and acquire the steady solutions. The other is to solve the unsteady problem by setting up initial temperatures and heat capacitors. The number of elements, each indicating a part of the lamp, is 12 for a SCFL with an outer globe.