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March 26, 2026 David Lacoursière

Semi Truck LED Headlights: The Complete Upgrade Guide for Every Brand

LED headlights have become the go-to upgrade for semi truck owners looking for better visibility, longer lifespan, and a modern appearance. Whether you're upgrading from factory halogens or replacing a failed LED assembly, understanding your options saves money and ensures you get the right fit. This guide covers LED headlight options for every major truck brand.

Why Upgrade to LED Headlights?

LED headlights outperform traditional halogen bulbs in virtually every category that matters to truck drivers:

Visibility: LED headlights produce 2-3x more lumens than halogen bulbs, throwing a brighter, whiter beam that illuminates road signs, lane markings, and hazards from farther away. This is especially critical during long night hauls and in adverse weather.

Lifespan: Quality LED headlights last 30,000-50,000 hours compared to 1,000-2,000 hours for halogen bulbs. For most trucks running 100,000+ miles annually, this means years without replacement versus changing bulbs every few months.

Energy efficiency: LEDs draw less power from the electrical system, reducing alternator load and potentially improving fuel efficiency slightly. Less heat generation also means less wear on the headlight housing and wiring.

DOT compliance: All LED headlights sold at EverTrust Parts are DOT and SAE compliant, meeting federal motor vehicle safety standards for on-road use.

LED Headlights by Truck Brand

Freightliner Cascadia LED Headlights

The Cascadia is the most popular truck for LED upgrades. Options include complete LED headlight assemblies for the 2008-2017 classic Cascadia and the 2018+ new Cascadia. LED assemblies feature projector-style beams with integrated LED DRLs (daytime running lights) for a distinctive modern look. LED bulb retrofits are also available for trucks keeping their original housing. Shop Cascadia LED headlights.

Peterbilt 579 & 587 LED Headlights

Peterbilt LED headlight assemblies provide a dramatic upgrade from the factory halogen units. The 579 headlight assembly accepts both LED and halogen bulb options. Full LED assemblies include chrome or black housing options with projector beams and LED accent lighting. Shop Peterbilt LED headlights.

Kenworth T680 LED Headlights

The Kenworth T680 features a sleek headlight design that looks even better with LED technology. Aftermarket LED assemblies for the T680 provide significant brightness improvements over stock halogen units. Available with chrome or black bezels to match your truck's style. Shop Kenworth LED headlights.

International LT & ProStar LED Headlights

International trucks benefit greatly from LED upgrades, especially the LT series and ProStar models. LED headlight assemblies for these trucks feature improved beam patterns and integrated LED positioning lights. Shop International LED headlights.

Volvo VNL LED Headlights

Volvo VNL trucks from 2004-2017 and the 2018+ redesign have dedicated LED headlight assemblies available. The newer VNL design already uses LED technology from the factory, but replacement assemblies are available when needed. Shop Volvo LED headlights.

Hino & Isuzu LED Options

Medium-duty trucks from Hino and Isuzu also have aftermarket LED headlight options. The Hino 155/195/268 and Isuzu NPR/NRR/NQR series all have LED assemblies available that dramatically improve nighttime visibility for city and regional delivery routes. Shop Hino headlights | Shop Isuzu headlights.

LED Headlight Bulb Size Guide

If you're replacing just the bulbs rather than the full assembly, here are the common bulb sizes for popular trucks:

Freightliner Cascadia (2008-2017): H11 low beam, 9005 high beam. Freightliner Cascadia (2018+): H11 low beam, 9005 high beam (or LED-specific). Peterbilt 579: H11 low beam, 9005 high beam. Kenworth T680: H11 low beam, 9005 high beam. International LT: Model-specific, check your owner's manual.

Full Assembly vs Bulb Replacement

You have two approaches to upgrading to LED:

Full LED Headlight Assembly

Replaces the entire headlight unit — housing, lens, reflector, and LED light source. This is the recommended approach for the best results. Advantages include purpose-built LED optics for optimal beam pattern, integrated features like LED DRLs and turn signals, factory-fresh appearance with clear lens, and plug-and-play installation with no modifications needed.

LED Bulb Retrofit

Keeps the original headlight housing and replaces only the halogen bulbs with LED bulbs. This is a cheaper option but has limitations: the halogen reflector housing isn't optimized for LED light output, you may get glare or poor beam patterns, and some retrofits may not be fully DOT compliant. For the best results, we recommend full LED assemblies.

Installation Tips

Installing LED headlight assemblies on a semi truck is typically a 30-45 minute job per side:

Start by disconnecting the battery for safety. Remove the grille or access panels as needed for your specific truck model. Disconnect the wiring harness from the back of the old headlight. Remove the mounting bolts — typically 3-4 bolts per headlight. Slide the old assembly out and install the new LED assembly in its place. Reconnect the wiring harness, making sure the connector clicks securely. After both sides are done, reconnect the battery and test low beam, high beam, and DRL functions. Adjust the beam aim using the built-in adjustment screws if needed.

Frequently Asked Questions

Are LED headlights legal for semi trucks?

Yes, as long as they meet DOT and SAE standards. All LED headlights sold at EverTrust are DOT/SAE compliant and legal for on-road use in all 50 states and Canada.

Do LED headlights need a special wiring harness?

Most aftermarket LED headlight assemblies from EverTrust are plug-and-play — they use the same electrical connector as the original headlights. No additional wiring or adapters are needed in most cases.

How much brighter are LED headlights vs halogen?

LED headlights typically produce 6,000-10,000 lumens compared to 1,500-2,000 lumens for standard halogen bulbs. This 3-5x improvement in light output translates to significantly better road illumination and safety.

Shop LED Headlights by Brand at Evertrust Parts

Browse our full catalog of aftermarket truck headlights →

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Related: Peterbilt 389 grille assembly | Peterbilt 389 headlight housing

Filed in: freightliner led headlights, kenworth led headlights, led headlight upgrade, peterbilt led headlights, semi truck led headlights, truck headlights
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