D.C. luminous tube system

D.C. Voltage fluorescent lamp

DC Ballasting means for fluorescent lamps

DC Power supply for high power discharge devices

Decorative light sets

Decorative lighting string with stacked rectification

Delayed extinction control

Device for applying particular voltage waveform for operating a

Device for controlling the intensity of the light emitted by a l

Device for prolonging the life of an incandescent lamp

Dielectric barrier discharge lamp lighting device

Dimming circuit for discharging lamp capable of turning off...

Direct current ballasting and starting circuitry for gaseous dis

Direct current ballasting and starting circuitry for gaseous dis

Discharge lamp ballast with resonant starting

Discharge lamp lighting device

Discharge lamp lighting device

Discharge lamp lighting device and lighting apparatus

Discharge lamp operating circuit

Discharge lamp operating circuit