2017-2019 Ford F-250 F-350 bulb size guide

The Ford Super Duty lineup—available as the F-250 and F-350—is built for heavy-duty work, towing, and off-road performance. From construction fleets and farm owners to RV haulers and overland enthusiasts, the F-Series Super Duty has earned its reputation for unmatched strength, durability, and capability.

Because these trucks are often used in demanding conditions—early-morning job sites, cross-state hauling, or rugged terrain—optimal lighting performance is critical for both safety and productivity. Upgrading or replacing the correct bulbs not only improves nighttime visibility but also gives your truck a modern, high-performance appearance.

This guide provides a detailed bulb size reference for 2017–2019 Ford F-250 and F-350 Super Duty models, helping you identify OEM halogen bulb types and offering upgrade recommendations to enhance your Ford Super Duty lighting performance.

7443 Lasfit LED turn signal lights for 2017 Ford F-350

Lasfit LED bulbs for 2019 Ford F-350

Lasfit LED bulbs for 2019 Ford F-350

1. Brightness & Beam Pattern: The Core of Safety and Driving Experience

Compared to OEM halogen bulbs, Ford F-250 F-350 LED headlight bulbs can produce up to 3–7 times more brightness with superior beam distance and clarity. High-quality LED bulbs utilize precision optical design to deliver a sharp, well-focused beam that illuminates the road ahead without causing glare to oncoming drivers—ensuring both comfort and safety during nighttime driving.

Brightness: The most critical factor when choosing LEDs is real brightness. Lumens indicate total output; wattage indicates power consumption. Normal efficiency is around 70–80 LM/W. For example, a 20W bulb should reasonably output 1400–1600 LM. If a bulb claims “10,000 LM” but is only 15W, it’s an inflated spec. So real-world beam performance matters more than numbers.

Beam Pattern: Premium LEDs replicate the halogen filament’s light source position, creating a sharp cutoff line and avoiding scattered beams

For 2017-2019 Ford F-250 F-350 owners seeking maximum performance, the Lasfit 4th-Gen LSplus Series LED headlights are a top choice. With a true 6500LM output (up to 700% brighter than stock halogens) and a 360° adjustable base, they deliver perfect beam alignment and superior road illumination without glare—turning night drives into daylight clarity.

2. Heat Dissipation & Durability: Built for Heavy-Duty Demands

The Ford F-250 F-350 endure extreme workloads—long towing sessions, off-road vibrations, heat, and moisture. Reliable LED lighting requires exceptional cooling efficiency.

Efficient Cooling: High-quality LED bulbs for Ford F-250 F-350 feature aluminum heat sinks or built-in fans to maintain consistent brightness during extended use.

Durability: Only bulbs that pass waterproof and dustproof testing can stay reliable in rainforests or deserts. While LEDs have a theoretical lifespan of tens of thousands of hours, this depends on solid thermal management and rugged construction.

The Lasfit LSplus Series excels with its advanced cooling system: dual-ball-bearing fans, built-in thermal control, 4th-gen external driver, dual heat pipes, and integrated fins. It runs stably with no dimming, IP67 waterproof, and reliable in -40℃ to 180℃. For Ford F-250 F-350 owners, this means unwavering performance even in the toughest off-road environments.

3. Compatibility: Avoid Errors & Installation Hassles

Modern vehicles like the Ford F-250 F-350 often use a CanBus system to monitor lighting. Installing non-compatible bulbs may trigger dashboard errors, flickering, or lighting failure.

Built-in Decoders: Prevent error messages or flickering for a hassle-free install.

Plug & Play: Choose LEDs that match OEM connectors without rewiring.

For Ford F-250 and F-350 owners seeking an easy modification experience, compatibility is a key factor that directly affects satisfaction. The Lasfit T-T15 reverse light/cargo light, equipped with built-in decoding technology and a true plug-and-play design, perfectly meets your needs.

4. Warranty & After-Sales Support: Long-Term Peace of Mind

Upgrading your Ford F-250 F-350 headlight bulbs is a long-term investment in safety and performance. Choosing a reputable brand with a solid warranty and responsive support ensures peace of mind.

Warranty: Reputable brands offer 1–2 years or more of coverage.

Support: Reliable technical help and replacements ensure satisfaction if issues arise.

For Ford F-250 F-350—vehicles built for long-term use and frequent modifications—choosing LSplus Series means stability and peace of mind. The series includes 2-year worry-free warranty and 45-day free return, giving owners complete confidence.

With this guide, you now have a clear overview of Ford F-250 F-350 bulb sizes and upgrade options. Whether you want a full Ford F-250 F-350 with LED lights setup or are simply looking for the right Ford F-250 F-350 replacement headlight bulbs, always select high-quality bulbs and ensure proper installation to achieve the best performance and longevity.

Note: This guide is based on general information for 2017-2019 Ford F-250 F-350 models. Specs may vary depending on year and trim. Always confirm your model before purchase. Lasfit offers a full range of LED Ford F-250 F-350 lighting solutions to meet every driver’s needs.