6500K ULTRALIT 4×6 LED headlight options
This ULTRALIT 4×6 series provides 6500K white LED output. Select the low- or high-beam version required and confirm the connector, mounting and available clearance.
Key Features & Benefits
6500K White Light Output
6500K describes the white appearance of the light. Check the complete beam pattern and aim after installation.
- Road visibility
- Contrast in low-light conditions
- Driver comfort over long distances
Increased Output Over Entry-Level LED Options
- Low Beam (Item #31088): 750 lumens
- High Beam (Item #31089): 1000 lumens
Compare the selected lamp’s output, electrical requirements and beam function with the position being replaced.
Durable Polycarbonate Housing & Lens
- Corrosion-resistant polycarbonate construction
- Impact-resistant lens protects from road debris
- Designed for long-term durability in harsh environments
Solid-State Reliability
Engineered to resist:
- Shock
- Vibration
- Temperature fluctuations
Ideal for heavy-duty trucking applications and rough road conditions.
Direct OEM Fitment
- Designed for standard 4″ x 6″ sealed beam applications
- Plug-and-play connection into factory wiring harness
- No major modifications required
Commonly used on trucks like the Peterbilt 379 and other compatible setups.
Dual Voltage Compatibility
Works on both 12V and 24V systems, making it suitable for a wide range of semi trucks and commercial vehicles.
Performance & Technical Specs
Low Beam (Item #31088):
- Output: 750 lumens
- Color Temperature: 6500K
- Beam Type: Low Beam
High Beam (Item #31089):
- Output: 1000 lumens
- Color Temperature: 6500K
- Beam Type: High Beam
Shared Specs:
- Headlight Size: 4″ x 6″
- Voltage: 12–24V
- Compliance: DOT/SAE, FMVSS 108
Installation & Fitment
- Plug-and-play for standard 4×6 connections
- Fits OEM headlight housings
- Designed for quick installation
Always confirm your headlight size and configuration before ordering.
Built for Daily Drivers and Serious Upgrades
Choose the low- or high-beam version for the actual lamp position and match the existing mounting and wiring.
What’s Included
- (1) ULTRALIT 4×6 LED Headlight (High or Low Beam depending on selection)
Frequently Asked Questions About 4×6 LED Headlights
What does 6500K mean for headlights?
6500K is the colour temperature and describes the light’s white appearance. It is not a brightness or beam-distance measurement.
Do I need both high beam and low beam headlights?
Yes, most vehicles require both to function properly. Low beam is used for normal driving, while high beam provides maximum visibility when needed.
Are these brighter than standard halogen headlights?
Use the output and electrical specifications listed for this exact assembly when comparing options. The installed result also depends on the original lamps, lens condition and correct headlight aim.
Will these fit my truck?
They are designed for standard 4×6 sealed beam applications. Fitment may vary depending on your specific setup.
Are these plug and play?
Yes, they plug into your existing wiring harness for easy installation.
Can these be used on 24V systems?
Yes, they are compatible with both 12V and 24V electrical systems.
Are these DOT compliant?
United Pacific lists DOT/SAE and FMVSS 108 conformity for the specified lamp. Confirm the correct application, installation and aim.
How do these compare to other 4×6 LED headlights?
These offer a balanced upgrade in brightness and performance compared to entry-level options, while remaining more affordable than premium brands.
Compare compatible headlight options
Browse Peterbilt 379 Headlights and compare the listed housing, wiring and beam functions for your truck.
