Electric device comprising at least one low-pressure mercury vap
Electronic ballast for fluorescent lamp
Electronic ballast for fluorescent lamps
Electronic ballast for gas discharge lamp having primary and aux
Electronic ballast having pulsating output voltage
Electronic ballast with ground-fault protection
Electronic ballast with improved lamp current crest factor
Electronic dimming ballast for compact fluorescent lamps
Electronic energy converter having two resonant circuits
Electronic starter combined with the L-C ballast of a fluorescen
Energy-efficient cost-effective electronic ballast