Clean LED Upgrade for 4×6 Headlight Systems
If you’re upgrading from factory sealed beam headlights, this ULTRALIT 4×6 LED headlight delivers improved clarity, modern styling, and reliable performance.
Designed for Peterbilt 379 dual headlight setups, this unit replaces your low beam with a brighter, more efficient LED solution while adding a clean white position light for a modern look.
⚠️ Important: Low Beam Module Only
This product is a low beam headlight only.
- Designed for the low beam position in a 4-light setup
- Must be paired with a matching high beam headlight
Running only low beam units will not complete your headlight system.
Key Features & Benefits
Dedicated Low Beam LED Output
Engineered for controlled low beam performance:
- Low Beam: 1,260 lumens
- Rated Output: 1,600 lumens (unit spec reference)
Provides improved forward visibility while maintaining a proper low beam pattern for on-road use.
Integrated White Position Light
Features a center-mounted LED bar:
- 9 bright white LEDs
- Clean DRL-style appearance
- Enhances daytime visibility
Note: Position light requires separate wiring.
Built for 12V & 24V Systems
Compatible with both:
- Standard 12V trucks
- 24V heavy-duty systems
Ideal for fleets and mixed-voltage setups.
IP67 Water-Resistant Construction
- Die-cast aluminum housing
- Polycarbonate lens
- IP67-rated protection
Built to withstand moisture, vibration, and harsh environments.
OEM Fit – Plug-and-Play
- Fits standard 4″ x 6″ headlight buckets
- Plugs into factory wiring harness for main beam
- No modification required for primary function
Fitment
Headlight Size:
- 4″ x 6″ rectangular
Common applications include:
- Peterbilt 379
- Other trucks using 4×6 sealed beam headlights
Performance & Electrical Specs
- Voltage: 12–24V
- Low Beam Output: 1,260 lumens
- Water Rating: IP67
- Housing: Die-cast aluminum
- Lens: Polycarbonate
- Beam Type: Low beam only
Installation & Technical Notes
- Plug-and-play for main headlight connection
- Position light requires separate wiring
- Must be paired with a high beam unit
Professional installation recommended for proper aiming.
Build Quality & Compliance
- DOT / SAE compliant
- Meets FMVSS 108 standards
- Designed for on-road use when installed correctly
What’s Included
- (1) 4×6 LED low beam headlight
- Integrated white position light
Frequently Asked Questions About 4×6 LED Headlights
Is this a full headlight or just low beam?
This is a low beam module only. You need a matching high beam headlight to complete your system.
Will this fit my Peterbilt 379?
Yes, this is designed for standard 4×6 headlight buckets used in Peterbilt 379 setups.
Do I need to wire the white position light separately?
Yes, the position light requires a separate wiring connection to function.
Are these brighter than halogen headlights?
Yes, LED headlights provide improved clarity and more consistent output compared to traditional sealed beam halogens.
Can this run on 24V trucks?
Yes, it is compatible with both 12V and 24V systems.
Is this plug-and-play?
The main headlight function is plug-and-play. The position light requires additional wiring.
Is this sold as a pair?
No, this listing is for a single headlight.
What should I pair this with?
You should pair this with a matching 4×6 LED high beam headlight for proper function.
