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Interchangeable Equivalents

H8 vs H9

The H8 and H9 are physically interchangeable bulb types that share the same base and socket design. Both bulbs fit the same housing, making them direct substitutes in most applications. The H8 is found in many vehicles, commonly in the various positions position, while the H9 appears in many vehicles, typically used for various positions. Although they fit the same socket, there may be minor differences in wattage or light output between the two. Below we break down the specifications, compatible vehicles, and practical swap guidance to help you choose the right bulb.

Vehicles Using H8

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Vehicles Using H9

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Use Both

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Specification Comparison

FeatureH8H9
Mount Typequarter-turn bayonet mount similar to H11quarter-turn bayonet mount similar to H11
Dual FilamentNo (single filament)No (single filament)
InterchangeableYes, fits H9 socketYes, fits H8 socket
Also Known AsH11, H9H11, H8

Can You Swap H8 and H9?

The H8 and H9 share the same physical base and socket type, which means you can use either one in a housing designed for the other. However, there may be slight differences in rated wattage or light output between the two. For the best results, use the specific bulb type listed in your vehicle's owner's manual. If your manual specifies H8 but you can only find H9, it will fit and work safely. When upgrading to LED, look for a kit that lists both H8 and H9 compatibility.

Shop H8 Bulbs on Amazon
Shop H9 Bulbs on Amazon

Frequently Asked Questions

Yes, the H8 and H9 share the same base design and are physically interchangeable. Either bulb will fit in a socket designed for the other. However, check your owner's manual for the recommended type, as there may be minor wattage differences.

The H8 and H9 are essentially the same bulb with different industry designations. They share identical base dimensions and socket fitment. The main difference may be in rated wattage or intended application, but physically they are interchangeable.

In standard halogen form, brightness depends on the specific bulb's rated wattage rather than just the size designation. Both H8 and H9 are available in halogen, LED, and HID versions. LED upgrades for either size typically produce 200-300% more light than the stock halogen. The key is choosing a quality LED kit in the correct size for your socket.

Based on our database, very few vehicles use both H8 and H9 simultaneously. These bulb types are typically found in different vehicle applications.

Both H8 and H9 bulbs are widely available at auto parts stores and online retailers like Amazon. LED upgrade kits typically cost $25-$60 per pair, while standard halogen replacements run $10-$30 per pair.
H11 vs H8H11 vs H9