The car HID bulbs of genuine original lamps are D series.
H series and 900X series are designed for halogen lamps by later manufacturers.
The model of xenon bulb is generally represented by three characters, "d ＃ X", such as "D1s" and "D2S"
D means xenon lamp.
＃ Is a number: "1, 2, 3, 4". The singular number means with starter, and the double number means without starter. Among them, 1 and 2 are mercury containing designs, and 3 and 4 are mercury free designs.
X is the letter: "s, R", s refers to the lens, and R refers to the reflective bowl.
D1s indicates: for the mercury xenon bulb with starter on the lens, D3 and D4 have the same appearance as D1 and D2, but the notch position of the base is different. Due to the application of a new environmental friendly mercury free design, the voltage is different. The voltage of D1 and D2 is 85V, while the voltage of D3 and D4 is 45V.
