Fog lights typically use halogen bulbs. The most common bases are H11, H8, H9, and H16, though some models use other types such as H3 or 9005/9006; LED and HID options exist but require proper housing and compatibility.
Common fog light bulb types
Fog-light systems in modern cars mostly rely on halogen bulbs inside sealed housings. Here are the bases you’re most likely to encounter when shopping for replacements.
- H11 — The workhorse for many contemporary fog lamps; widely used across brands
- H8 — Common in older and some entry-level models, usually lower wattage
- H9 — Another halogen option seen in some makes and trims
- H16 — Appears in a number of modern fog-light assemblies
- H3 — A wedge-based halogen bulb used in certain fog-lamp designs
- 9005/9006 (HB3/HB4) — Found in some regional configurations; verify fit for your car
The exact bulb type depends on your vehicle’s design and market; always verify by checking the current bulb or the owner’s manual before purchasing replacements.
LED and HID alternatives
In recent years, aftermarket LED and HID fog light options have grown in popularity, offering brighter output and longer life—though compatibility with your housing and legal rules varies by region.
- LED fog bulbs designed to fit specific bases (such as H11, H8, H9, H16); they typically run cooler and last longer but may require CAN-bus adapters to avoid electrical errors
- HID fog light kits that replace halogen bulbs; they require ballasts and careful alignment to avoid glare and may not be legal in all areas
When upgrading, ensure you select the correct base, wattage, and beam pattern. Poor-fit LED/HID retrofits can impair visibility and create glare for other drivers.
Practical tips for finding the right bulb
To identify the right bulb quickly, use these steps: start with your vehicle’s owner manual, inspect the bulb in the headlamp housing for the base code, or pull the old bulb and take it to a parts counter. OEM or manufacturer-approved replacements are the safest bet.
Regulatory and safety considerations
Fog lights are subject to local traffic rules that govern color, brightness, and usage. In many regions, selective yellow (amber) or white fog lights are permitted; improper retrofits or misalignment can blind other drivers and attract penalties.
Summary
Halogen bulbs—particularly H11, H8, H9, and H16—remain the most common choice for fog lights, with LEDs and HIDs available as upgrades when properly matched to the vehicle. Always verify the exact specification for your car and follow local regulations.