Simple, All-in-One LED Upgrade for 4×6 Headlights
If you want to upgrade your headlights without dealing with separate low and high beam units, this ULTRALIT 4×6 LED headlight is one of the simplest solutions.
It replaces traditional sealed beam headlights with a modern LED unit that handles both high and low beam functions in a single housing.
Why Choose a Combined High/Low Beam Headlight?
One Unit Instead of Two
Unlike split systems that require separate low and high beam lights, this headlight:
- Combines both functions into one unit
- Simplifies installation
- Reduces wiring complexity
This is ideal for drivers looking for a straightforward upgrade.
Key Features & Benefits
High & Low Beam LED Output
This headlight includes both beam functions:
- Dedicated LED low beam
- Dedicated LED high beam
Delivers consistent LED output without needing separate components.
Direct Replacement for Sealed Beam Headlights
Designed to replace common sealed beam part numbers:
- H4651
- H4656
Fits standard 4×6 rectangular headlight housings.
Durable Crystal Lens Design
Built with a crystal-style lens:
- Maintains light clarity
- Protects internal LED components
- Designed for long-term performance
Reinforced Aluminum Reflector
The internal reflector is reinforced for durability and performance:
- Helps maintain beam pattern
- Improves structural integrity
Rugged Anti-Vibration Construction
Designed for real-world truck conditions:
- Resistant to vibration
- Suitable for heavy-duty applications
- Built for long-term reliability
Fitment
Headlight Size:
- 4″ x 6″ rectangular
Common applications include:
- Peterbilt 379
- Other trucks using H4651 / H4656 sealed beam headlights
Performance & Electrical Specs
- Beam Type: High & Low Beam
- Voltage: 12V
- Lighting Type: LED
Installation & Technical Notes
- Direct sealed beam replacement
- Fits standard 4×6 housings
- Plug-and-play design for most applications
No additional wiring required for basic functionality.
Build Quality & Compliance
- DOT / SAE compliant
- Meets FMVSS 108 standards
- Designed for proper on-road use
What’s Included
- (1) 4×6 LED headlight (high & low beam combined)
Frequently Asked Questions About 4×6 LED Headlights
Does this include both high and low beam?
Yes, this headlight includes both high and low beam functions in one unit.
Do I need separate headlights for high beam?
No, this unit combines both functions, so no additional high beam headlight is required.
Will this fit my Peterbilt 379?
Yes, if your truck uses 4×6 sealed beam headlights (H4651 or H4656), this is a direct replacement.
Is this plug-and-play?
Yes, it is designed as a plug-and-play replacement for standard sealed beam headlights.
Are these better than halogen headlights?
Yes, LED headlights provide improved consistency, durability, and efficiency compared to halogen sealed beams.
Is this sold individually or as a pair?
This listing is for one headlight. Be sure to order the correct quantity for your setup.
Can I use this on 24V systems?
This product is listed for 12V systems. Compatibility with 24V systems may vary—confirm before installing.
What makes this different from low beam-only LED headlights?
This unit includes both high and low beam in one housing, while low beam-only units require a separate high beam headlight.
