H7 vs H11 Headlight Bulbs: Key Differences Explained
H7 and H11 sit next to each other on almost every bulb-fitment chart, and from a distance the two look like cousins — similar length, similar single-beam job, similar price bracket. Pull one apart from the other and the differences turn out to matter a lot at the socket. Here's what actually separates them, and how to know which one your car needs.
H7 and H11 are both single-filament, single-beam bulbs — but they use different bases and cannot be swapped. H7 uses a PX26d base with the bulb glass sitting straight in line with the connector, and is common on European-origin cars sold in India. H11 uses a PGJ19-2 base with an offset, L-shaped body, and is the more common fitment on Japanese and Korean-origin cars, plus most fog lights. Same job, different plug — check your existing bulb before ordering either one.
1. At a Glance — H7 vs H11 Specs
If you've landed here because you're staring at two similar-looking bulb boxes wondering which one fits your car, start with this table. It settles most of the confusion in one look.
| Feature | H7 | H11 |
|---|---|---|
| Beam Type | Single (Low beam, sometimes high beam) | Single (Low beam or fog light) |
| Base / Socket | PX26d | PGJ19-2 |
| Bulb Shape | Straight, inline with connector | Offset, L-shaped body |
| Connector Pins | 2 pins, wide flat tab | 2 narrow pins with side tabs |
| Halogen Wattage | 55W | 55W |
| Halogen Lumens | ~1,500 lm | ~1,350 lm |
| LED Lumens (pair) | 6,000–10,000 lm | 6,000–8,000 lm |
| Ideal LED Colour Temp | 5,500K–6,500K | 5,000K–6,000K |
| Halogen Lifespan | ~450–500 hrs | ~270 hrs |
| LED Lifespan | 30,000–50,000 hrs | 30,000–50,000 hrs |
| Also Known As | H7LL (long-life variant) | H8, H9, H16 (related, not identical) |
| Interchangeable? | No | No |
| Common on | VW Polo/Vento, Skoda Rapid/Slavia, some Honda/Tata models | Hyundai Creta/i20, Kia Seltos, Swift, most fog lamps |
Fitment varies by trim and model year — always match against the bulb currently in your headlight before ordering.
2. What Is the H7 Bulb?
Single-Beam, Inline Base PX26d socket · straight bulb body
The H7 has been the default low-beam bulb on a large share of European cars for decades, and that heritage carried over to European-origin models sold in India. It's a single-filament bulb, which means one H7 handles just one beam — usually low beam, though a handful of older models used it for high beam too, in a separate housing.
What sets it apart physically is the PX26d base: the glass envelope sits in a straight line with the metal base, and a small flat locating tab on the side keeps the bulb oriented correctly when it clicks into the reflector or projector housing. There's no bend or offset in the bulb body — it's a clean, symmetrical design.
Because H7 is a single-job bulb, a car that uses it for low beam will have a separate bulb — often H1, H7, or an LED/HID module — dedicated purely to high beam.
Cars Commonly Fitted with H7
Volkswagen: Polo, Vento, Taigun (some variants)
Skoda: Rapid, Slavia, Kushaq (some variants)
Honda: older City and Civic low beam
Tata: a few Nexon and Altroz trims
Note: H7 fitment has been shrinking in newer Indian launches as many brands move to H11 or projector-LED units, so always confirm against the model year.
3. What Is the H11 Bulb?
Single-Beam, Offset Base PGJ19-2 socket · L-shaped body
H11 is also a single-filament bulb, and it's the bulb you'll find most often on Japanese and Korean-origin cars sold in India, as well as in fog lamp housings across nearly every brand. Its job is almost always low beam or fog light — never high beam.
Physically, the giveaway is the PGJ19-2 base: the bulb's glass sits at a slight offset from the connector, giving the whole unit a gentle L-shape rather than H7's straight line. Two narrow pins with small plastic locating tabs on either side of the base keep it correctly seated.
This offset shape is precisely why H11 and H7 cannot be forced into each other's housing — the filament or LED emitter would sit at the wrong distance and angle from the reflector, throwing the beam pattern off and creating glare instead of a clean cut-off line.
Cars Commonly Fitted with H11
Hyundai: Creta, i20, Venue (low beam)
Kia: Seltos, Sonet (low beam)
Maruti Suzuki: newer Swift, Baleno (verify variant)
Toyota: Fortuner, Innova Crysta (fog lights)
H11 is also the single most common fog-light bulb across Indian cars, irrespective of what the main headlight uses — so many owners end up buying H11 even if their headlight itself runs on H7 or H4.
4. H7 vs H11: Head-to-Head
This is the comparison most people are actually searching for, because both bulbs do the same job — low beam — and the packaging on aftermarket LED boxes doesn't always make the base difference obvious.
H7 vs H11
Side-by-SideThe core difference is the base and body shape. H7 is a straight bulb on a PX26d base; H11 is an offset, L-shaped bulb on a PGJ19-2 base. Both are single-beam, single-filament designs meant for low beam — H7 is occasionally used for high beam on older platforms, H11 almost never is.
On brightness, stock halogen H7 typically edges out stock halogen H11 slightly — around 1,500 lumens against roughly 1,350 lumens — because H7's straighter filament geometry throws a marginally wider spread. In LED form, the gap mostly disappears; a well-built LED chip closes that difference regardless of base type.
On fitment, H7 sockets are deeper and narrower, built for the bulb's inline shape. H11 housings are shaped to accept the bulb's offset bend. Because the internal geometry of the reflector or projector is tuned to exactly where the filament or LED chip sits, using the wrong base — even with an adapter — shifts the light source out of the designed focal point.
On heat management for LED upgrades, H11's offset shape means the heat sink fins have slightly less room to work with in tight fog-light housings, so a compact, well-cooled LED design matters more for H11 retrofits than for H7.
5. Are H7 and H11 Interchangeable? Can You Use H11 Instead of H7?
No — and this is worth being direct about, because "universal fit" claims on some low-cost LED listings suggest otherwise. H7's PX26d base and H11's PGJ19-2 base are shaped differently, spaced differently, and locate into the housing differently. An H11 bulb will not click into a genuine H7 socket, and an H7 bulb will not click into a genuine H11 socket, without a third-party base adapter.
Adapters exist and are sold online, but they come with a real trade-off: an adapter changes the exact distance and angle between the light source and the reflector or projector lens that the headlight was engineered around. Move that light source by even a couple of millimetres and the beam's cut-off line — the sharp edge that keeps light off oncoming drivers' eyes — blurs or shifts upward. That's not a cosmetic issue; it's a glare risk for other road users and, in stricter jurisdictions, a fitment that would fail inspection.
6. H4 vs H7 vs H11 — Where Does H4 Fit In?
H4 gets mentioned in the same breath as H7 and H11 often enough that it's worth placing on the same map. The key difference is that H4 is a dual-filament, dual-beam bulb — one unit handles both high and low beam using a 3-pin P43t base — while both H7 and H11 are single-filament, single-beam bulbs that each do only one job.
| Feature | H4 | H7 | H11 |
|---|---|---|---|
| Beam(s) per bulb | High + Low (one unit) | Low only (mostly) | Low / Fog only |
| Base | P43t (3-pin) | PX26d (2-pin) | PGJ19-2 (2-pin, offset) |
| Typical use in India | Motorcycles, older cars | European-origin cars | Japanese/Korean-origin cars, fog lights |
| Interchangeable with the others? | No | No | No |
If your headlight has a single housing controlling both beams, you're almost certainly looking at H4. If it has two visibly separate bulb sockets — one for low, one for high — you're in H7 or H11 territory, and the base shape tells you which. For a deeper breakdown of H4 alongside H11 and the paired high-beam bulb 9005, see Auxbeam India's H4 vs H11 vs 9005 comparison guide.
7. Which Indian Cars Use H7 or H11?
Use this as a starting reference — always cross-check with your owner's manual or the marking on your existing bulb before ordering, since fitment changes across facelifts and trims.
| Vehicle | Low Beam | High Beam | Fog Light |
|---|---|---|---|
| Volkswagen Polo / Vento | H7 | H1 / H7 (variant-dependent) | H11 |
| Skoda Rapid / Slavia | H7 | H1 / LED module | H11 |
| Hyundai Creta (2020+) | H11 | 9005 | H11 |
| Kia Seltos | H11 | 9005 | H11 |
| Maruti Swift (newer) | H11 | 9005 | H11 |
| Hyundai i20 (2020+) | H11 | 9005 | H11 |
| Toyota Fortuner / Innova Crysta | H11 | 9005 | H11 |
| Tata Nexon / Altroz (select trims) | H7 | H1 / projector unit | H11 |
Fitment shown is indicative and varies by year and trim — verify before purchase.
8. Upgrading H7 or H11 to LED
The case for moving either bulb to LED is the same: more usable light on the road, less heat wasted as infrared inside the housing, and a bulb that outlasts the vehicle's ownership cycle instead of blowing every year or two on rough Indian roads.
- Focal point accuracy matters most. A good H7 or H11 LED bulb places its LED chip at the exact same point the original halogen filament sat, so the reflector or projector's beam pattern stays intact instead of scattering light everywhere.
- Compact, all-in-one drivers fit better in tight European headlight housings (common with H7) and offset fog-light pockets (common with H11), where a bulky external driver box simply won't close the dust cap.
- CAN Bus compatibility is essential on most Hyundai, Kia, Volkswagen, and Skoda models — these read bulb resistance, and a plain LED draws less current than halogen, which can trigger a dashboard bulb-fault warning. Look for a built-in decoder chip.
- Colour temperature between 5,000K and 6,500K gives the clearest, least fatiguing light for Indian night driving and monsoon conditions — anything bluer than 7,000K actually loses contrast in rain and fog.
- IP-rated waterproofing is non-negotiable for fog-light H11 bulbs given how exposed those housings are to monsoon spray and road grime.
9. Which One Do You Need?
The fastest way to be sure is to pull the existing bulb and read the code printed on its base — but if you'd rather work it out from your vehicle type, here's a quick guide.
Likely need: H7 LED Bulb
Polo, Vento, Rapid, Slavia and similar platforms commonly run H7 on low beam. Confirm the base shape — straight and inline means H7.
Likely need: H11 LED Bulb
Creta, Seltos, i20, newer Swift and similar models typically run H11 on low beam. The base has a visible offset bend.
Likely need: H11 LED Bulb
Across almost every Indian car brand, fog lamp housings default to H11 regardless of what the main headlight uses.
Likely need: H4 LED Bulb
If one bulb handles both beams from a single socket, that's H4, not H7 or H11. See the full breakdown in the H4 vs H11 vs 9005 guide linked above.
10. Frequently Asked Questions
Q: Are H7 and H11 bulbs the same?
No. Both are single-beam bulbs, but H7 uses a straight PX26d base while H11 uses an offset PGJ19-2 base. The bulb shape, pin layout, and how each locates into its housing are different — they are not the same bulb.
Q: Are H7 and H11 interchangeable?
No. The base shapes are different enough that an H7 will not lock into a genuine H11 housing, and vice versa, without a third-party adapter — and adapters shift the light source's focal point, which distorts the beam pattern and can dazzle oncoming drivers.
Q: Can I use H11 instead of H7?
Not directly. H11 will not physically fit an H7 socket without an adapter, and even with one, the filament or LED chip won't sit at the exact point the reflector or projector was designed around. This usually causes glare and an unfocused beam — buy the bulb your headlight housing was built for instead.
Q: What is the difference between H11 and H7?
The main differences are the base type (H7 is PX26d and straight; H11 is PGJ19-2 and offset), how each bulb seats in the housing, and which cars use them — H7 is more common on European-origin models, H11 on Japanese and Korean-origin models and on fog lights across most brands.
Q: Which Indian cars use H7 headlight bulbs?
H7 shows up on several Indian-market cars including the Volkswagen Polo and Vento, Skoda Rapid and Slavia, older Honda City variants, and select Tata and Mahindra trims for low beam. Fitment varies by model year, so confirm with the owner's manual or the existing bulb.
Q: Which Indian cars use H11 headlight bulbs?
H11 is widely used across the Hyundai Creta and i20, Kia Seltos, newer Maruti Suzuki Swift and Baleno, and as the fog light bulb on most Indian cars regardless of what the main headlight uses.
Q: My H7 or H11 LED bulb triggers a bulb-error warning on the dashboard. What now?
Cars with CAN Bus monitoring (common on Hyundai, Kia, Volkswagen and Skoda models) read bulb resistance, and a standard LED draws less current than halogen, which trips a fault warning. The fix is an LED bulb with a built-in CAN Bus decoder chip — Auxbeam India's H7 and H11 LED ranges include this for compatible models.
🏁 Final Verdict
H7 and H11 exist to do the exact same job — a clean, focused low beam — but they were engineered around different sockets, and that's not a detail to shrug off. Forcing one into the other's housing, even with an adapter, moves the light source away from the point the headlight's reflector or projector was designed around, and that shows up as glare for other drivers and a patchier beam for you.
H7
Straight bulb, PX26d base. Common on European-origin cars sold in India. Single beam, usually low.
H11
Offset, L-shaped bulb, PGJ19-2 base. Common on Japanese/Korean-origin cars and most fog lights. Single beam, low or fog.
Whichever one your car takes, the upgrade path to LED is worth it — sharper light, lower power draw, and a bulb that isn't blowing every monsoon season. Auxbeam India builds its H7 and H11 LED bulbs to match the original focal point, with CAN Bus decoding for compatible models and IP67/IP68 sealing for Indian roads.
Check the base marking on your current bulb, match it to what's above, and pick the correct one before you order.
Shop H7 / H11 LED Bulbs at Auxbeam India