Morimoto D1S 5500K XB OEM HID Bulb, Pack of 1 Compatible replacement for all HID/Xenon headlights accepting "D1S" bulbs 2000 hour lifespan lasts 6-10 years under average daily use Available in 4500K, 5500K, 6500K to suit a wide variety of tastes Meets and exceeds OE specifications for measured luminosity and reliability Contains 1 bulb only