H8 Bulbs Explained: Features, Uses, and Buying Tips

If you’re planning to upgrade or replace your car’s lighting, you’ll likely come across the H8 bulb, which is commonly used for fog lights and daytime running lights. While it may look similar to the H11, it has a different wattage and fit, so it’s important to know the distinction when selecting a replacement.

What are H8 bulbs, and how do they compare to H11 bulbs?

An H8 bulb is a 12-volt single-beam automotive light that runs at 35 watts. It may look similar to an H11 bulb, but the two are NOT interchangeable - they have different fittings and electrical specs.

Power and brightness - H8 bulbs draw 35W and give you moderate light output of around 800 lumens. H11 bulbs draw 55W and deliver brighter illumination at roughly 1,250 lumens, making them more ideal for headlights.

Primary use - H8 bulbs are mainly designed for your fog lights. H11 bulbs appear more often in low-beam headlights, but you may also be able to use them as fog lights, depending on your vehicle.

Connector tabs - Both use PGJ19-style bases, but the tab layout differs slightly. Looking closely, you’ll see that H8 bulbs use the PGJ19-1 base, while H11 bulbs use PGJ19-2. That small difference means they’re not interchangeable.

In short, you’ll get more efficient, targeted lighting with the H8 bulb, while H11 bulbs provide stronger output for broader illumination.

Upgrading to an H8 LED bulb

H8 LED bulbs can produce over 8,000 lumens while using much less power than halogen options. This lower energy draw means less heat, which then helps extend their lifespan to 20,000 to 30,000 hours or more. And thanks to their balance of brightness and efficiency, H8 LED bulbs are a strong choice for fog lights, delivering clear and controlled illumination without draining your system.

What about H8 HID bulbs?

With an H8 HID bulb, you can equip your car with high-intensity discharge technology that creates light by passing an electrical current through xenon gas. This creates an intense arc of light that’s much brighter than what you get from standard halogen bulbs.

HID systems need extras like ballasts. You will also need to position the bulbs precisely for them to work properly. That’s why many people stick with H8 LED bulbs for fog lights, as they're easier to install.

Check these before buying H8 bulbs

Size or socket compatibility - Before you buy, confirm that the H8 bulb is the correct fit for your vehicle. Check your owner’s manual or use a reliable online compatibility checker to match the bulb to your make and model. If you install the wrong bulb, you’ll get less light and might even damage your car’s lighting system.

Ballast compatibility - Make sure that you have a ballast if you plan to use an HID H8 bulb. Sometimes, you may need to replace your current ballast to avoid flickering or failure.

Brightness and lumens - Lumens indicate how bright a bulb is. Too much brightness with higher lumens can create glare and distract other drivers. Aim for a balanced output that enhances your view of the road without compromising safety.

• Brand and quality - H8 bulbs vary widely in terms of build quality and performance. Make sure that you’re getting your H8 bulbs from reputable manufacturers with a track record in automotive lighting. You can also get better warranties and reliable after-sales support from trusted brands.
• Ease of installation - Many H8 bulbs come in plug-and-play designs that make them easy to install on your own. If you prefer a quicker install with fewer adjustments, look for options designed for straightforward fitting.
• Buy from a trusted source
• HIDS-DIRECT offers a wide range of H8 bulbs for different applications. You can check out securely and enjoy the added confidence of a 30-day no-hassle return policy, whether you’re ordering within the UK or from overseas.