{"product_id":"partsam-4x6-led-sealed-beam-headlight-4x6in-rectangular-h4-socket-45w-hi-lo-beam","title":"Partsam 4x6 LED Sealed Beam Headlight 4x6in Rectangular H4 Socket 45W Hi\/Lo Beam","description":"\u003cp\u003e\u003cstrong\u003ePartsam 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.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThese 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.\u003c\/p\u003e\n\n\u003ch3\u003eWill these fit my truck or heavy-duty rig?\u003c\/h3\u003e\n\u003cp\u003eMost 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.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFits numerous models including classic Mack and many Freightliner\/Caterpillar fitments.\u003c\/li\u003e\n  \u003cli\u003eInterchange numbers include H4651, H4652, H4656, H4666, H6545 for cross-referencing.\u003c\/li\u003e\n  \u003cli\u003eMay require pin re-arrangement or an adaptor if vehicle wiring differs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do these LEDs compare to halogen or HID options?\u003c\/h3\u003e\n\u003cp\u003eThese 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.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e45W total power with multiple high-intensity LED emitters for strong illumination.\u003c\/li\u003e\n  \u003cli\u003eInstant on\/off performance and reduced heat compared with halogen glass bulbs.\u003c\/li\u003e\n  \u003cli\u003eNo external ballast required, unlike many HID conversions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs installation plug-and-play or will I need extra parts?\u003c\/h3\u003e\n\u003cp\u003eInstallation 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.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eUses standard H4-style three-prong socket for most 4x6 applications.\u003c\/li\u003e\n  \u003cli\u003eTypically no cutting, splicing, or ballast is required.\u003c\/li\u003e\n  \u003cli\u003eAdapter or pin rearrangement may be necessary for a small number of vehicles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the durability and environmental protections?\u003c\/h3\u003e\n\u003cp\u003ePartsam 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.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWeatherproof sealed housing prevents moisture ingress into the LED assembly.\u003c\/li\u003e\n  \u003cli\u003eRobust casing tolerates vibration and road shock common in trucks and classics.\u003c\/li\u003e\n  \u003cli\u003eLower heat output and efficient operation extend component life.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho 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.\u003c\/p\u003e\n\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are these 4x6 Partsam LEDs plug-and-play?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Usually yes; they fit standard three-prong sockets, but some vehicles may need pin re-arrangement or an adapter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will these work on heavy-duty trucks?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — compatible with many truck models using 4x6 sealed beams; check interchange numbers and housing size first.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Partsam","offers":[{"title":"Default Title","offer_id":55171412918615,"sku":"B01N8UG2UG","price":79.43,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/partsam-front-view-4x6-led-headlight.jpg?v=1790444477","url":"https:\/\/britishgarage.co.uk\/products\/partsam-4x6-led-sealed-beam-headlight-4x6in-rectangular-h4-socket-45w-hi-lo-beam","provider":"British Garage","version":"1.0","type":"link"}