SEALIGHT H4 LED Headlight Bulbs Pack of 2 6000K Cool White — 36,000LM, IP68

These SEALIGHT H4 (9003/HB2) LED bulbs are engineered as direct-fit upgrades for vehicles using the H4/9003/HB2 socket. They combine a high-lumen twin-sided LED layout with a slim 0.04-inch board, a turbo fan cooling system, and sealed construction to provide broad, shadow-free illumination without bulky retrofits. Designed to be the same physical size as stock bulbs, they aim to simplify installation while offering longer life and stronger light at 6000K daylight-white color temperature.

How bright are these SEALIGHT H4 bulbs compared with standard halogens?

The SEALIGHT H4 LEDs use enhanced double-sided chips to create very high output—rated up to 36,000 lumens per pair—producing a much stronger, whiter beam than typical halogen lamps. The 6000K color makes road signs and lane markings easier to recognize under low-light conditions.

• Rated 36,000 lumens (pair), dramatically brighter than stock halogens
• 6000K cool-white output for clearer contrast at night
• Dual-sided LED array to increase usable beam spread

Will these bulbs fit my car and are they easy to install?

SEALIGHT designed the H4 bulbs to be true 1:1 in size to most factory H4/9003/HB2 lamps, so they install using the original socket and dust cover in most vehicles. The product is sold as plug-and-play; most users can swap in the bulbs within minutes without tool modifications.

• True 1:1 physical sizing for straightforward fitment
• Standard H4/9003/HB2 connector compatibility with ~99% vehicles
• Plug-and-play installation—typically under 5 minutes per bulb

How does the cooling and durability compare to other LED options?

These bulbs use a high-speed turbo fan (rated up to 15,000 RPM) combined with a compact heat sink to manage junction temperatures and maintain consistent light output. IP68 sealing protects internal electronics from water and dust, and the expected service life is up to 60,000 hours under normal conditions.

• 15000 RPM turbo fan for active thermal management
• IP68 waterproof rating for wet and dusty environments
• Estimated 60,000-hour lifespan for long-term use

Will these bulbs glare other drivers or cause flicker and error codes?

The 360° illumination design with ultra-thin LED boards is intended to avoid black spots and reduce glare when properly aimed. Most installs are free from flicker; however, some vehicles with sensitive CAN-bus systems may need an additional decoder or anti-flicker harness to prevent dashboard errors.

• 360° light distribution reduces dark zones and harsh glare
• Built-in drivers for stable output in most vehicles
• Decoder may be required for certain vehicles—customer support available

Who is this for: Drivers who want a straightforward upgrade from halogen H4/9003/HB2 bulbs to a high-output, cool-white LED solution without extensive modifications. These SEALIGHT bulbs suit owners seeking brighter, wider nighttime illumination, long service life, and IP68-rated protection—especially useful for commuters, delivery drivers, and weekend road travelers. If your vehicle reports error codes after installation, a simple decoder setup typically resolves compatibility issues; reach out to SEALIGHT support for guidance.