If you're in the market to upgrade the lighting of your vehicle from its stock halogen bulb, you've likely come across the H11 bulb as a suitable option. But, you might have also noticed variants such as H11A and H11B, and are left wondering about their differences.

This article focuses primarily on the differences between H11 and H11B, since they are frequently compared to each other. We will also touch upon the other variants, H11A and H11B.

For quick reference, here are the key points:

- H11 vs. H11B: These two types of halogen bulbs are not interchangeable due to their unique connector designs.

- H11A vs. H11B: Confusion often arises between H11A and H11B when upgrading to HID bulbs, as some manufacturers produce different versions of these bulbs with varying return wire positions. The right choice assures a clean light output, free from shadows or dark spots.

h11 vs h11b headlight bulbs comparison

Main Difference between H11 and H11B Bulb

Connector of H11 vs. H11B

The primary distinction between the H11 and H11B halogen bulbs lies in the connector (or plugs). H11B bulbs have exposed pins that plug in like the cords on your household electronics. H11 bulbs, on the other hand, keep the wiring enclosed within the connector. This provides a snugger fit for the pins and wires.

This core difference ensures these two bulb types cannot be used interchangeably.

h11 vs h11b connector difference

Base Difference of H11 vs. H11B

A second significant difference between the H11 and H11B bulbs is their base design. H11 bulbs sport a standard PGJ19-2 base, whereas H11B bulbs come with a PGJY19-2 base.

This variation in base design also directly influences how the bulb is fitted into the headlight assembly.

h11 vs h11b base difference

Installation Process

The installation process for the H11 bulbs is straightforward—simply plug them into the socket. The H11B headlight bulbs, however, require a twist-and-lock installation into the socket. But the complexity of the headlight bulb installation also depends on the specific vehicle housing.

The above discussion primarily outlines the reasons behind the non-interchangeability of H11 and H11B bulbs due to their physical attributes.

In the following section, we will further explore the technical aspects of the H11 and H11B, offering a more detailed understanding of these two bulb types.

Comparing the H11 vs. H11B Halogen Headlight Bulbs

Beam Type

The H11 bulb can be used for low beams and fog lights. The H11B is most commonly used for low-beam headlights.

Light Output

The H11 and H11B bulbs have similar light output, around 1350 lumens. Note that the position makes more of a difference in how bright the bulb appears. A bulb in the high beam position will seem brighter than the same bulb used for the low beam, because of the angle and direction of the light, not the actual brightness of the bulb.

Wattage

Both H11 and H11B bulbs draw about 55 watts of power.

Lifespan

H11 bulbs typically last around 270 hours before the filament burns out. H11B bulbs last much longer, with an average lifespan of 930 hours.

Compatibility

The H11 bulb fits several other headlight sockets, including H8, H9, and H16. The H11B socket is only compatible with other H11B bulbs.

Vehicle Use

H11 bulbs are near-universal across most automakers. H11B is less common, mainly used by Hyundai and Kia vehicles. We will talk about H11B headlight bulbs fit cars in the final FAQs section.

Related guides:
H11 vs. H8 vs. H9 vs. H16 Bulbs: The Differences & Similarities
H11 vs. 9006: What’s The Difference? Are They Interchangeable?
H11 vs. 9005 Bulbs: What Are the Differences Between Them
H7 vs. H11 Bulb: What’s the Difference Between These Headlights?

Further Reading: H11A vs H11B, What’s the Difference

For those upgrading to HID headlight bulbs, you may come across the "H11A" and "H11B" options and find yourself confused. The key distinction lies in the placement of the return wire on the bulb's locking ring.

H11A bulbs have the return wire positioned between the two locking tabs at the "bottom" of the ring. On H11B bulbs, the return wire sits at the "top" of the ring instead.

When installed properly, the return wire should always face downward in the headlight housing. If using the wrong orientation, the wire will end up on top, casting a shadow and reducing visibility.

This orientation matter only applies to HID bulbs, since they have a return wire running the length of the glass tube. LED bulbs are adjustable and lack this return wire, so H11A vs H11B does not affect them.

So if installing HID headlights, be sure to choose the variant (H11A or H11B) that positions the return wire facing downwards when rotated into place.

Which Bulb Do I Need?

Here are two methods to determine which bulb your vehicle needs:

1. Check the owner's manual. Your vehicle's manual will specify the bulb size that is compatible with your headlights. Follow the manual's guidance for a seamless bulb replacement.

2. Examine the existing bulb. For ultimate accuracy, go straight to the source - the bulb itself. Remove the old bulb and look for any etched markings denoting the bulb type or part number.

3. Search online.

Find the Right LED Upgrade at SEALIGHT

Finding the perfect LED upgrade for your vehicle is simple with SEALIGHT. Use our handy vehicle bulb finder to input your car's make, model and year. We'll match you with LED bulbs guaranteed to fit and shine bright.

SEALIGHT carries H11 LED bulbs in varying lumen outputs and prices to suit your needs and budget. All our bulbs ship free and come with a 90-day return policy. Ready to drive with confidence? Browse our LED selection now to find your perfect match.

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FAQs

Q: What vehicle does a H11B bulb fit?

Ans: The H11B bulb is mainly found in the low beam headlights in the Hyundai Elantra Sedan (2007, 2009, 2010), Hyundai Elantra Hatchback (2009, 2010), Hyundai Sonata (2009, 2010) and Kia Sorento (2007, 2008, 2009).

Q: Is H11 and H11B the same bulb?

Ans: No, they are not the same bulb. H11 and H11B bulbs have different connectors and bases, so they are not interchangeable.

Q: Can I use h11b instead of H11?

Ans: No, you cannot directly replace an H11 bulb with an H11B. To install H11B LED bulbs where H11 bulbs are required, you would need an H11B adapter and do some conversion wiring.

Q: What bulb is interchangeable with H11B?

Ans: There are no bulbs that are interchangeable with H11Bs.