Partsam 4x6 LED Sealed Beam Headlight 4x6in Rectangular H4 Socket 45W Hi/Lo Beam

Partsam 4x6 inch LED sealed-beam headlights deliver a bright, energy-efficient 45W hi/lo beam replacement for 4x6 rectangular headlamp housings on trucks and classic cars.

These Partsam LED sealed beams are designed to replace aging halogen or lower-output sealed units in a wide range of vehicles, from heavy-duty trucks to classic muscle and late-model sedans. Each lamp integrates multiple high-intensity LEDs inside a weatherproof, sealed enclosure so you can swap in the new unit without modifying the headlight housing. They use standard H4-style three-prong sockets and are listed by multiple interchange numbers to match legacy sealed-beam fittings.

Will these fit my truck or heavy-duty rig?

Most likely yes — the 4x6 size and standard three-pin socket make these LEDs compatible with many commercial and vocational models. They are commonly used on older and some current heavy-duty rigs with rectangular sealed beams, provided the headlight bucket accepts a 4x6 sealed unit and the wiring matches the three-pin connector.

• Fits numerous models including classic Mack and many Freightliner/Caterpillar fitments.
• Interchange numbers include H4651, H4652, H4656, H4666, H6545 for cross-referencing.
• May require pin re-arrangement or an adaptor if vehicle wiring differs.

How do these LEDs compare to halogen or HID options?

These LED sealed beams provide higher lumen output per watt, faster startup, and longer life than typical halogen sealed-beam bulbs, while avoiding the complexity and ballast needs of HID systems. They deliver crisp white light with better energy efficiency and a sealed design that reduces moisture and dust ingress compared with open-bulb conversions.

• 45W total power with multiple high-intensity LED emitters for strong illumination.
• Instant on/off performance and reduced heat compared with halogen glass bulbs.
• No external ballast required, unlike many HID conversions.

Is installation plug-and-play or will I need extra parts?

Installation is usually straightforward: remove the old sealed beam and install the Partsam 4x6 LED unit into the headlight bucket using the vehicle’s existing retaining ring and three-pin connector. On some vehicles the plug pins may be arranged differently and you might need to reposition pins or add an adapter (not included) to match your wiring harness.

• Uses standard H4-style three-prong socket for most 4x6 applications.
• Typically no cutting, splicing, or ballast is required.
• Adapter or pin rearrangement may be necessary for a small number of vehicles.

What are the durability and environmental protections?

Partsam sealed-beam LEDs are built to withstand road conditions with a fully sealed housing to keep out water and dust. The rugged construction and efficient LEDs reduce failure modes compared with exposed halogen bulbs, making them a practical choice for vehicles driven in wet or dirty environments.

• Weatherproof sealed housing prevents moisture ingress into the LED assembly.
• Robust casing tolerates vibration and road shock common in trucks and classics.
• Lower heat output and efficient operation extend component life.

Who is this for: These Partsam 4x6 LED sealed-beam headlights suit owners who need a simple, durable lighting upgrade for vehicles that use rectangular 4x6 sealed beams — including heavy-duty trucks, vocational rigs, and classic cars that retain original headlamp housings. If you want brighter, longer-lasting lighting without HID ballasts or complex retrofits, these units are a practical drop-in replacement, provided your headlight bucket and wiring match the 4x6 sealed-beam standard or can be adapted.