H11 bulbs are used for low-beam headlights in most passenger cars, and they’re also commonly used for fog lights. They are not high-beam bulbs.
In this article, we explain what an H11 bulb is, where it typically appears in vehicle lighting, and how to verify or replace the bulb correctly. The goal is to clarify common automotive lighting terminology and help readers make informed replacements.
What is an H11 bulb?
H11 is a 12-volt halogen bulb with a single filament designed for a specific base configuration that fits certain headlight housings. The designation refers to the bulb’s size, shape, and base, rather than its brightness. Halogen H11 bulbs are commonly rated around 55 watts and are intended for use in low-beam headlights or, in many models, as fog lights. As technology evolves, LED or HID variants with compatible bases exist, but they require proper fitment and may involve regulatory considerations.
Common uses
The following outlines typical applications where H11 bulbs appear in modern vehicles.
- Low-beam headlights in a wide range of cars and trucks
- Fog lights in many models, often located low in the front bumper
- Some aftermarket or auxiliary lighting configurations, depending on the headlight design
In practice, H11 is primarily a low-beam (and fog-light) bulb in standard automotive setups. Always confirm with your vehicle’s manual or by inspecting the current bulb to avoid missteps.
How to verify in your vehicle
To ensure you’re using the correct bulb type for your car, follow these steps:
- Check the owner’s manual or the vehicle’s documentation for the exact bulb specification and recommended wattage.
- Inspect the existing headlight bulb or the headlight housing to confirm the base type (H11) and wattage (commonly 55W for halogen H11).
- When replacing, choose the correct H11 halogen bulb or an approved LED/HID option that is compatible with your vehicle’s electrical system and housing.
- Handle bulbs with clean gloves or a cloth to avoid transferring oils from your skin, and ensure proper seating and alignment in the connector.
Following these steps minimizes the risk of mismatched bulbs, electrical issues, or improper beam alignment.
Summary
The H11 bulb is predominantly a low-beam (and sometimes fog light) option in modern vehicles. It is not designed for high-beam applications, which are typically served by other bulb types such as H1, H3, H7, or 9005/HB3 variants depending on the make and model. When replacing bulbs, always verify with the owner’s manual and ensure compatibility with your headlight housing and local regulations.
What light bulb is the same as H11?
You may have heard of popular bulb sizes like H11, 9005, or H13. For example, H11 is the same as H8 and H9. 9005 is equivalent to HB3, H10, 9040, 9055, 9140, 9145, 9150, and 9155. Knowing your bulb size is very important because they are vehicle-specific.
What headlight bulb for 2005 CRV?
Honda CR-V (2005-2006) Bulb Size Chart
| Headlights (High Beam and Low Beam) | H4 (9003 HB2) |
|---|---|
| Headlights (Low Beam) | H1 |
| Front Fog Lights | 9006 (HB4) |
| Reverse Light (Back-Up Light) | 7443 (7440) |
| Brake Light (Rear)(Vehicle Origin: JPN) | 7443 (7440) |
Can I replace my H11 halogen with LED?
All vehicles fitted with halogen headlight bulbs from the factory are suitable for LED conversion. The main advantage is a massive increase in road illumination and therefore improved safety when driving at night.
Are H11 headlights high beams?
H11 bulbs are designed for use as low beam headlights, while 9005 bulbs are typically used for high beams. This results in a higher brightness level for the 9005 bulbs compared to the H11 bulbs.