Lamp arrangement employing a resonant circuit formed from an autotransformer and a capacitor where the capacitor is switched out of the resonant circuit and into a power factor correcting circuit when the ignition of the lamp is sensed

摘要

An improved fluorescent ballast circuit for 277 volt commercial application is disclosed utilizing a resonant circuit mechanism to generate high open circuit voltage (OCV) during lamp starting. The result is an energy efficient effective lighting system for commercial buildings.