Top 3 Headlight Assemblies for 2013–2019 Kenworth T680 Trucks

Reliable headlights aren’t optional when you’re operating a Kenworth T680, they’re a critical safety component. Whether you’re running night routes, starting before sunrise, or pushing through fog and rain, your headlights determine how well you see and how well other drivers see you.

Over time, factory halogen headlights fade, yellow, and lose output. That reduced visibility makes spotting road hazards harder and increases fatigue behind the wheel. For this reason, many owner operators and fleets upgrade to LED headlight assemblies.

LED headlights deliver brighter illumination, longer lifespan, and lower maintenance, while also giving your truck a cleaner, modern appearance. Below, we break down three of the best headlight assemblies for 2013–2019 Kenworth T680 trucks, ranked as:

1. Best Direct Replacement

2. Best Mid Range Aftermarket Option

3. Best Premium Upgrade

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What to Look for When Choosing a Kenworth T680 Headlight Assembly

Before comparing options, it helps to understand what actually matters when upgrading headlights. Light output is measured in lumens, but higher lumens alone don’t guarantee better visibility. Beam clarity, cutoff, and housing quality are just as important.

When shopping for a new headlight assembly, focus on:

• Halogen vs. LED: LEDs offer better efficiency, brightness, and lifespan

• Lumen output: Balanced brightness with controlled beam pattern

• DOT / SAE compliance: Must meet FMVSS 108 for legal road use

• Plug-and-play installation: Uses factory wiring and mounting points

• Warranty coverage: Important for high-mileage trucks

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Best Direct Replacement For Kenworth T680 Headlight United Pacific 35743 LED Headlight Assembly 

Approx. price: $342 per assembly

The United Pacific 35743 is a true direct fit LED replacement for 2013–2019 Kenworth T680 trucks. It installs using the factory mounting points and original wiring harness, making it one of the easiest upgrades from stock halogen headlights.

This assembly replaces every lighting function with LEDs, reducing bulb failures and maintaining consistent brightness over time. Drivers will immediately notice improved road visibility, especially on dark highways and poorly lit routes.

Key Benefits

• All-LED construction (low beam, high beam, turn signal, running light, side marker)

• Approx. 1,500 lumens (low beam) / 1,800 lumens (high beam)

• DOT / SAE compliant and FMVSS 108 approved

• Plug-and-play installation with removable load resistor

• 1-year / 100,000-mile warranty

Why it’s a strong value:
This is the best option for drivers who want a noticeable lighting upgrade without high cost or complicated installation. It delivers better performance than factory halogens while preserving an OEM-style look and fit.

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Best Mid-Range Aftermarket Option For Kenworth T680 Headlight: United Pacific 31456 LED Headlight Assembly

Approx. price: $423 per side

The United Pacific 31456 is designed for drivers who want brighter output and enhanced styling without stepping into premium pricing, the United Pacific 31456 is an excellent middle-ground option.

With significantly higher high beam output, this option excels on backroads, country highways, and poorly lit work zones where extra forward lighting matters most.

Key Benefits

• All-LED construction for all lighting functions

• Approx. 2,100 lumens (low beam) / 3,400 lumens (high beam)

• DOT / SAE compliant and FMVSS 108 approved

• Plug-and-play installation with removable load resistor

• Limited lifetime warranty

Why it’s worth the upgrade:
This is the choice for the consummate professional, drivers who run night routes, rural roads, or demanding conditions and want the best possible lighting performance with long-term reliability.

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Best Premium Upgrade Aftermarket Option For Kenworth T680 Headlight : Automann 564.59091DCY

Approx. price: $514 per side

For drivers who demand maximum visibility and long-term durability. Built as a direct-fit LED assembly for 2013–2019 Kenworth T680 trucks, it is installed using factory mounting points and original wiring.

This headlight retains a factory-style chrome housing but upgrades performance with high-output CREE LEDs, producing a whiter, more focused beam. The added clarity is especially helpful on long nighttime runs and rural routes.

Notable Features

• All-LED construction for all lighting functions

• Approx. 2,400 lumens (low beam) / 1,600 lumens (high beam)

• DOT / SAE compliant and FMVSS 108 approved

• Plug-and-play installation with removable load resistor

• 1-year / 100,000-mile warranty

Why choose this option:
This headlight balances performance, reliability, and appearance. It’s ideal for drivers who want more usable light and a sharper look you expect for this price.

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How to Choose the Right Headlight Assembly for Your T680

The best headlight upgrade depends on how you use your truck. Price matters, but fitment, beam quality, and durability determine long-term satisfaction.

Key Considerations

• Compatibility: Confirm correct model year and driver/passenger side

• Beam pattern: Controlled cutoff improves visibility without glare

• Driving conditions: Night routes and rural roads justify higher output

• Fleet vs. owner-operator use: Fleets may prioritize cost and warranty

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Final Thoughts

Upgrading your Kenworth T680 headlights is a smart investment in safety, visibility, and driver comfort.

• The United Pacific 35743 is the best direct replacement for simple, cost-effective LED performance.

• The United Pacific 31456  offers stronger brightness and added visual appeal at a reasonable price.

• The Automann 564.59091DC delivers premium output and durability for demanding night and rural driving.

The right choice comes down to how and where you drive.

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Frequently Asked Questions

Why upgrade from halogen to LED headlights?
LED headlights are brighter, last longer, and maintain consistent output over time while reducing maintenance.

What semi truck do these headlights fit?
Kenworth T680 years: 2013, 2014, 2015, 2016, 2017, 2018, 2019

Are these headlights legal for road use?
Yes. All listed assemblies are DOT and SAE compliant and meet FMVSS 108 standards. Proper aiming after installation is recommended.

Which option is best for high-mileage trucks?
Drivers who log heavy miles or operate on rural and backroads benefit most from the premium United Pacific 31456 due to its higher output and lifetime warranty.

Do these headlights require wiring modifications?
No. All options listed are plug-and-play and use factory wiring harnesses.

Will LED headlights blind other drivers?
Not when properly designed and aimed. All assemblies listed use controlled beam patterns that meet road-use standards.

Is this a direct replacement?
Yes. Direct-fit LED assemblies reduce downtime and maintenance, making them fleet-friendly.