POWER CONTROL AND ENERGY SAVING METHOD AND APPARATUS FOR HIGH-INTENSITY GAS DISCHARGE (HID) LAMPS USED IN ILLUMINATION SYSTEMS
A method and an apparatus for controllably operating a gas discharge lamp in an electrical circuit containing an electromagnetic ballast and at least one electrical device selected from the group which includes a variable-impedance electrical circuit, a selector device and a variable inductive eleme...
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Format: | Patent |
Sprache: | eng ; spa |
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