The operating circuits for discharge lamps with various lamp voltages which differ from usual ones are analyzed by the simulation method. The coefficients of the mathematical model equation shown in the previous paper for different lamp voltages are determined by the assumption that the operating waveforms of the voltage and current of different voltage lamps are similar to those of commercially available lamps. In the case of various lamp voltages at rated power (400 W) operation, operating circuits of a reactor type and a reactor-capacitor type for the mercury discharge lamps are analyzed on a digital computer. For both of these types, operational characteristics at various ratios of lamp voltage to source voltage are obtained by this analysis. Optimization of operating circuits is discussed from various points of view, such as the circuit power factor, the lamp current fluctuation rate, the current wave peak factor, the capacitor voltage and the physical size.