Introduction In this article we’ll explore D1S HID bulb as well as review Bullvision D1S HID bulb in as much detail as possible. Background of D1S HID bulb D1S is a type of high-intensity discharge (HID) bulb used in automotive headlights. The “D” in D1S stands for “discharge,” and the “1” indicates that it is… Continue reading Review : Bullvision D1S LED bulb