H3 LED KITS
- Merchant Reviews -
H3 LED Kits
H3 is a small single-filament bulb with a distinctive “flying lead” — a short wire pigtail coming off the base instead of a rigid connector. It’s most commonly found in fog lights and in some older or auxiliary headlight applications. Upgrading H3 fogs to LED gives you a cleaner, whiter light that cuts through weather better than the yellowish halogen.
H3 is usually about your fog lights
Because H3 lives mostly in fog housings, aim and color matter: fog lights are meant to throw a wide, low beam right in front of the vehicle, so a well-designed H3 LED preserves that pattern rather than scattering. Match your exact size (your fogs and headlights are almost always different bulbs) with the Year/Make/Model finder at the top of the page.
The flying-lead base makes install simple — connect the lead and seat the bulb. As always, cooling drives lifespan. Free shipping over $75, lifetime warranty, 50,000+ reviews since 2004.
Frequently asked questions
Is H3 a fog light bulb?
Most often, yes. H3 is very common in fog lights, and also appears in some older or auxiliary headlight applications. It is a single-filament bulb, so it handles one function. Use the finder to confirm where your vehicle uses it.
What is the wire on an H3 bulb?
That is the H3 'flying lead' - a short wire pigtail off the base instead of a rigid connector. It is normal and part of the H3 design. You simply connect the lead when installing the bulb.
Will an LED H3 work well in fog lights?
Yes, when it is designed for the job. Fog lights need a wide, low beam, so a good H3 LED preserves that pattern and adds a cleaner white color that performs better in rain and snow than yellow halogen.