Lumens Factory OE Replacement HID Bulb Pairs
Upgrade with Lumens Factory OE Replacement / Upgrade Xenon HID Bulbs 1 Year Warranty.
*** Sold & Priced as a pair ***
Currently, the factory Xenon HID market is divided into 4 bulb types (D1, D2, D3, D4) in which they are then divided into 3 other sub-types (S, R, C). The bulb types are not interchangeable. Either the physical connectors are different, or the voltage required is different. D1 and D3 types look physically identical, and D2 and D4 types looks identical.
D1 and D3 bulbs: Aside from being just a bulb, these bulbs are easily distinguished by the metal box attached to the actual glass bulb itself. The metal box is an 'igniter' which is generally built as a seperate piece in D2 and D4 systems. These bulb types are much more expensive than its D2 / D4 counterparts for this reason (and also because the other bulb type is more common). There are 2 main differences between D1 and D3 bulbs. First is the voltage required to operate the bulb: D1 bulbs operate at 85V while D3 bulbs operate at 42V. Secondly, D3 bulbs are newer more environmentally friendly versions of D1 bulbs; D3 bulbs are mercury free. Because of these differences, D1 and D3 bulbs cannot be interchanged UNLESS their ballasts are replaced with the corresponding bulbs (you cannot mix components from 2 systems together).
D2 and D4 bulbs: D2 bulbs are currently the most commonly found HID bulb used by manufacturers. Unlike the D1 and D3 bulbs, these bulbs do not have ignitors built on the bulb itself. The same differences between D1 and D3 bulbs are true for these bulbs. First is the voltage required to operate the bulb: D2 bulbs operate at 85V while D4 bulbs operate at 42V. Secondly, D4 bulbs are newer more environmentally friendly versions of D2 bulbs; D4 bulbs are mercury free.Because of these differences, D2 and D4 bulbs cannot be interchanged UNLESS their ballasts AND IGNITORS are replaced with the corresponding bulbs to create a full D2 OR D4 system (you cannot mix components from 2 systems together).
Typically bulbs from differnt suppliers will have slightly different colours, so it is recommended that they be replaced in pairs.