Ballast circuit for a gas discharge lamp having a cathode pre-he

Ballast circuit for eliminating flicker in gaseous discharge lam

Ballast circuit for starting fluorescent lamps

Ballast device for uv radiator and also method and device...

Ballast for a discharge lamp having a continuous-operation...

Ballast for a discharge lamp having a continuous-operation...

Ballast for fluorescent lamp

Ballast scheme for a fluorescent lamp with preheated filaments

Ballast structure for central high frequency dimming apparatus

Ballast with efficient filament preheating and lamp fault...

Ballast with filament heating control circuit

Ballast with relamping circuitry

Beam mode lamp with voltage modifying electrode

Brightness controlled CRT

Built-in starter type fluorescent lamp socket