HID's require the use of 2 bulbs in order to have both high and low beams... there is 1 company that has some sort of motor that moves the bulb in order to achieve a hi/lo effect...
They sell kits to put into your stock housings... however hid beam patterns are VERY different than normal filament bulbs'. So usually you end up with a crappy pattern but... search and I'm SURE you'll find them installed in a million different ways on civic.
also just for your info... they require a "ballast" as well as the bulbs... the ballast converts the voltage for the hid bulbs.
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