Ballast circuit for gas discharge lamp

Ballast circuit for high intensity discharge (hid) lamps

Ballast circuit for high intensity discharge lamps

Ballast circuit for low wattage gaseous discharge device

Ballast circuit having electromagnetic interference (emi)...

Ballast circuit with improved transfer functions

Ballast circuit with independent lamp control

Ballast circuit with integral time delay relay

Ballast circuit with lamp current regulating circuit

Ballast circuits for discharge lamps

Ballast circuits for gas discharge lamps

Ballast containing protection circuit for detecting...

Ballast control device

Ballast device for fluorescent tubes comprising an...

Ballast device for uv emitter and method and device for...

Ballast for a discharge lamp

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

Ballast for a lamp and method for operating a ballast for a...

Ballast for at least one electric incandescent lamp

Ballast for at least one gas discharge lamp, and a method...