D1S
D1S is a designation for a type of xenon high-intensity discharge (HID) automotive lamp used in headlights. It belongs to the D-series family, which also includes D1R, D2S, D2R, and related bulbs. The D1S variant is typically used in projector-style headlamps, while D1R variants are associated with reflector optics.
D1S lamps operate at about 35 watts and require an external electronic ballast to ignite the xenon
Construction and compatibility: The D1S bulb has a distinct base that interfaces with a specific ballast and
Installation and maintenance: Replacing HID bulbs should be done with care to avoid glass damage and skin
Market and context: D1S remains widely used in a range of vehicles, with availability from OEM manufacturers