SEALIGHT H4/9003 LED Headlight Bulbs Pack of 2 — 6500K Daylight, 70,000LM, IP68

SEALIGHT H4/9003 LED bulbs deliver a high-output 6500K white beam with 70,000 lumens per pair and a focused halogen-style pattern for safe night driving.

These SEALIGHT H4 (9003) L2S LED bulbs replace standard halogen H4 units and are designed to produce a brighter, whiter beam while matching the original high/low beam emitting position. Each bulb uses 24 advanced LED chips and an integrated cooling system so the light stays stable and durable. They arrive as a plug-in pair with IP68 ingress protection for wet conditions and updated electronics to minimize interference with vehicle systems.

How bright and what color temperature will I see on the road?

The bulbs produce a very bright, crisp white output rated at 70,000 lumens for the pair and a 6500K color temperature that reads as daylight white. That color helps improve contrast and object definition at night without appearing overly bluish.

• 70,000 LM total output for the pair (high lumen design)
• 6500K daylight-white color for better visual clarity
• 24 LED chips per bulb for broad 360° illumination
• Halogen-positioned emitters to preserve beam shape

Will these bulbs fit my vehicle and keep the correct beam pattern?

SEALIGHT designed the L2S H4 bulbs to match the halogen filament placement so the high and low beams maintain the intended cutoff and focus. The compact size mirrors original H4/9003 dimensions, reducing the chance of unwanted glare or scattered light when installed in stock housings.

• Precise emitter placement mirrors halogen beams
• Sized to match original H4/9003 fittings for easy fitment
• Compatible with 99% of vehicles — newer ECUs may need adapters
• Built-in error-reduction electronics to limit flicker and codes

How is heat managed and how long will these LEDs last?

Heat control uses a high-speed silent cooling fan rated to 25,000 RPM plus a full aviation-grade aluminum body to quickly move heat away from the LEDs. Efficient cooling extends the working life and helps the bulbs maintain output for many hours of service.

• 25,000 RPM silent cooling fan for rapid thermal dissipation
• Aviation aluminum housing for consistent heat transfer
• Rated life up to 70,000 hours under typical conditions
• Stable output with reduced risk of thermal dimming

Are these bulbs easy to install and safe for vehicle electronics?

The SEALIGHT H4/9003 set is engineered as a near-direct swap with no external driver required and a compact, integrated design for straightforward installation. The updated 2026 electrical system minimizes radio interference and reduces the likelihood of dashboard errors, though a few sensitive vehicle computer systems may need CANbus adapters.

• No separate external driver — single-unit installation
• Updated 2026 electronics to reduce interference and error codes
• IP68 waterproof rating for rainy and wet conditions
• Includes two bulbs for left and right headlamp replacement

Who is this for: drivers who want a direct, high-lumen upgrade from halogen H4/9003 bulbs without modifying housings or adding external drivers. These bulbs suit commuters, long-distance drivers, and anyone seeking a clearer, whiter beam and robust weather protection. If your vehicle has an unusually sensitive lighting control module, you may need a CANbus adapter to eliminate error messages.