H7 Bulb
A single-filament halogen headlight bulb commonly used for low beam or high beam in European vehicles. One of the most popular bulbs for LED headlight upgrades.
H7 is one of the most widely used headlight bulb types in the world, found in everything from Volkswagens to BMWs to Hyundais. It's a single-filament bulb — meaning one H7 handles either low beam or high beam, but not both (that's the H4's job).
The standard H7 halogen runs at 55W and produces about 1,500 lumens with a color temperature around 3200K (warm yellowish-white). LED H7 replacements typically offer 3,000-6,000 lumens at 6000K (cool white), which is a dramatic visibility improvement — though the higher color temperature is a preference divide. Some drivers prefer the natural look of 4300K LED replacements.
The catch with LED H7 upgrades is the base clip design. H7 uses a PX26d base, but different car manufacturers use different retaining mechanisms — some need adapters, and some LED bulbs have heat sinks that don't fit behind the headlight housing's dust cover. Always check fitment for your specific make and model.
Specifications
| Type | Single filament |
| Standard wattage | 55W (halogen) |
| Common use | Low beam, sometimes high beam |
| Base | PX26d |
Related Terms
- H1 Bulb
A compact single-filament halogen bulb used in headlights and fog lights. Smaller than H7 with a different connector — common in older European and Japanese vehicles.
- HID Lights (Xenon)
High Intensity Discharge lights that create light by arcing electricity through xenon gas. Brighter and whiter than halogen, but being replaced by LEDs in modern vehicles.
- Projector Housing
A headlight type that uses a convex lens to focus and shape the light beam into a sharp, defined pattern. Handles LED and HID upgrades much better than reflector housings.
Mentioned in
What’s The Difference Between H1 And H7 Bulbs? Comparison Table
Your H1 high beam and H7 low beam run on the same 12 V, 55 W — it's the filament position and reflector shield that keep one from blinding oncoming traffic, not a wattage difference.
Do LED Bulbs Work in Projector Headlights?
Two H7 LED kits with identical lumen ratings can produce wildly different beam patterns — because chip geometry, not raw brightness, determines whether your projector housing actually focuses the light.