Abstract: A parallel RC network sensitive to the impedance of a gas discharge device is provided in the electronic ballast of this device along with a series connected inductive coil. As the impedance through the device changes, the oscillator frequency of the ballast would change accordingly and the voltage through the coil would change, thereby changing the impedance in such a manner as to insure that the voltage through the gas discharge device remains unchanged. The ballast would include a switch-mode, push-pull oscillator including a pair of emitter-resistors and a pair of fast diodes.