Upgrade Your Peterbilt Headlights the Right Way
If your factory sealed beam headlights are dim, outdated, or failing, this ULTRALIT 4×6 LED high beam is a direct upgrade designed for improved visibility and modern styling. Built for heavy-duty applications, it delivers strong output with a crisp beam pattern while adding a distinctive amber position light.
Key Features & Benefits
High Output LED Performance
Delivers up to 1,600 lumens on high beam, providing stronger forward visibility compared to traditional halogen sealed beams.
Integrated Amber Position Light
A center LED bar with dual-function amber lighting adds both visibility and a custom look, ideal for show trucks and highway presence.
OEM Fitment for 4×6 Applications
Designed as a direct replacement for standard 4×6 sealed beam headlights, allowing easy integration into compatible housings.
Durable, Road-Ready Construction
Die-cast housing and a polycarbonate lens are built to handle harsh trucking environments, resisting moisture, debris, and vibration.
Dual Voltage Compatibility
Operates on 12V–24V systems, making it suitable for a wide range of semi trucks and heavy-duty vehicles.
Performance & Compatibility
- Headlight Size: 4″ x 6″
- Beam Type: High Beam Module
- Light Output: 1,600 lumens (high beam), 1,260 lumens (low reference output)
- Voltage: 12–24V
- LED Color: Amber position light
- Compliance: DOT/SAE, FMVSS 108
Common applications include:
- Peterbilt 379
- Other trucks using standard 4×6 sealed beam headlights
Fitment may vary by configuration. Always confirm your headlight size before ordering.
Installation & Technical Details
- Plug-and-play for main headlight connection
- Additional wiring required for amber position light function
- Designed to fit existing headlight buckets and connectors
Professional installation recommended for optimal wiring and aiming.
Built for the Long Haul
With an IP67-rated housing, this headlight is sealed against water and dust intrusion, ensuring long-term durability in real-world trucking conditions.
What’s Included
- (1) ULTRALIT 4×6 LED High Beam Headlight
- Integrated amber position light
- Standard connector for OEM harness
Frequently Asked Questions About Peterbilt 379 4×6 LED Headlights
Are these headlights plug and play?
The main headlight connection plugs into your factory harness. The amber position light requires additional wiring.
Will this fit my Peterbilt 379?
This light is designed for standard 4×6 sealed beam applications commonly found on Peterbilt 379 trucks. Fitment may vary depending on your setup.
Is this a high beam or low beam headlight?
This is a high beam module only. You will need a matching low beam unit for a complete setup.
How bright are these compared to halogen headlights?
LED headlights provide significantly improved brightness and beam clarity compared to traditional halogen sealed beams, especially for nighttime driving.
Are these headlights waterproof?
Yes, the housing is rated IP67, meaning it is sealed against dust and water exposure under normal operating conditions.
Can I use these on 24V trucks?
Yes, these headlights are compatible with both 12V and 24V systems.
Do these meet DOT regulations?
Yes, they are listed as DOT/SAE compliant and meet FMVSS 108 standards.
Do I need to modify anything to install these?
No major modifications are required for the main headlight install. Only the position light requires additional wiring.
