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Posts Tagged: HID headlight

HID headlight

HID headlight terminology An HID headlight bulb requires much higher current than a Halogen bulb to start the arc and build brightness to a steady state. So there are really three current levels; striking current, run up current and stead state. HID headlight bulbs require AC current, so the ballast not only boots voltage, but also acts as an inverter, changing DC to AC current at around 250 to 450Hz. HID Striking Current The amount of amps and voltage needed to start the arc. During the strike phase, the ballast … Read More


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