233248 ⎘
Circuit arrangements or apparatus for igniting or operating discharge lamps; Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps not having an auxiliary starting electrode for high-pressure lamps
CIRCUIT ARRANGEMENT AND METHOD FOR ADAPTING THE OUTPUT OF HIGH-PRESSURE DISCHARGE LAMPS
#2Method and apparatus and system for adjusting power to HID lamp to control level of light output and conserve energy (ballast multi-tap power output)
#3Voltage control load center, modular voltage control transformer circuit, and method of making and using
#4Step sinusoidal voltage controlling method for hid, flourescent and incandescent light dimming applications