The 'C' bulbs have a base compatible with either but the glass bulb has no painted area like the 'R' style bulbs.ĭ1S and D3S bulbs look similar, but are not cross-compatible**ĭ1 and D3 have an igniter built into the base, whereas D2 and D4 rely on the igniter inside of it’s accompanied ballast. The 'R' bulbs are for reflector housings (note the painted area of the glass). projector) housings (not for use in reflector housings).
A 9005 base has a different diameter and is not cross-compatible.ĭ2S and D4S use the same base, but they are not cross-compatible** A 9012 bulb can be modified to fit a 9006 housing and vice versa. * 9005, 9006, and 9012 all use the same electrical connector, but the bases are different. To help navigate these murky waters, we have attached a reference guide below:īULB CROSS REFERENCE GUIDE - Halogen/HID/LED Bulbs Also, always feel free to reach out to the distributor if you need further clarification.Īnother thing to note, is that often the varying bulb classifications are brand specific and things get a bit hairy. It's like "I need a 9007 bulb, which is actually the same as a 9004 bulb which also happens to be the equivalent of an HB2 bulb." Where do we begin?Īs obvious as it sounds, just pick one! If you're purchasing from our website,, Amazon or Ebay we will always include the fitment and compatibility in the item description. If you are like most, navigating the various bulb names is one of the trickiest parts of the entire purchase and install.
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