Replacement bulb for existing D4S D4R HID xenon bulb. HID Xenon Bulb: Ultra Bright 3100 lumen Xenon bulb: Produces up to 5x brighter light then halogen, uses 35% less power, increases visibility, and made to last up to 5000-hour lifetime. Each item contatin 1 pair of bulbs (pack of 2 bulbs). Replacement of the original bulb, Plug n play installation. Product does not include ballast.
