Ballast apparatus
Ballast circuit
Ballast circuit
Ballast circuit
Ballast circuit
Ballast circuit
Ballast circuit equipped with ground fault detector
Ballast circuit for a cathode-heated type of gas discharge lamp
Ballast circuit for accurately regulating hid lamp wattage
Ballast circuit for eliminating flicker in gaseous discharge...
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