Product Overview
If you love the classic look of sealed beam headlights but hate the weak halogen output, this is the upgrade you’ve been waiting for. RetroBright headlights are designed to look period-correct while delivering modern LED performance, improved safety, and long-term reliability.
Key Features & Benefits
Classic Look, Modern Performance
Maintains the original sealed beam appearance while upgrading to modern LED technology—perfect for restoration builds and classic trucks.
Strong, Usable Light Output
- Low Beam: 2000 lumens / ~42,000 candela
- High Beam: 3000 lumens / ~56,000 candela
Focused beam pattern provides significantly better road visibility compared to halogen headlights.
Plug-and-Play Installation
Designed with an H4 connector to plug directly into factory headlight wiring—no cutting or modifications required in most setups.
Advanced LED Driver Technology
Integrated PWM LED driver maintains consistent output and performance during extended use.
Durable, Long-Lasting Construction
- Cast aluminum housing for heat dissipation
- UV-treated polycarbonate lens (stronger than glass)
- Replaceable LED cartridges for serviceability
Efficient & Long Life Operation
- Lower power draw than halogen
- Runs cooler
- Up to 6x longer lifespan compared to traditional sealed beams
Available Options
-
- Classic White (3000K): Warm, vintage-style output
- Modern White (5700K): Crisp, bright modern output
- High Beam Only Versions: Available for custom setups
Performance / Compatibility / Use-Case
Fits vehicles using 5.75″ round sealed beam headlights (PAR46), including:
- Kenworth W900A
- Classic trucks and custom builds
- Any application using sealed beam trade numbers:
- 4000
- 4040
- H4001
- H5001
- H5006
Best suited for:
- Classic truck restorations
- OEM-style upgrades
- Drivers wanting improved visibility without changing appearance
- Show trucks maintaining period-correct styling
Installation / Fitment / Technical Details
- Plug-and-play H4 connection
- 9–18V DC input
- LHD beam pattern (North America)
- Sold individually (order quantity based on your setup)
Note: Some older vehicles may require additional wiring depending on ground configuration.
Build Quality / Warranty
- Polycarbonate lens (impact-resistant)
- Cast aluminum housing
- Serviceable LED design
Meets DOT and SAE requirements for road use.
Warranty: 2-year manufacturer warranty.
What’s Included
- (1) 5.75″ RetroBright LED Headlight
Frequently Asked Questions
Will these fit a Kenworth W900A?
Yes, these are designed to replace 5.75″ sealed beam headlights commonly used on Kenworth W900A and similar trucks.
Do these look like original headlights?
Yes, they are specifically designed to maintain a classic sealed beam appearance while upgrading performance internally.
Are these plug-and-play?
Yes, they use a standard H4 connector and are plug-and-play for most applications.
Are these brighter than halogen sealed beams?
Yes, they provide significantly improved visibility with a more focused beam pattern and higher output.
What is the difference between 3000K and 5700K?
3000K provides a warmer, vintage-style light, while 5700K offers a brighter, more modern white output.
What does candela mean compared to lumens?
Lumens measure total light output, while candela measures how focused that light is. Higher candela means better visibility down the road.
Do I need to replace all headlights at once?
Varies by setup. Most trucks use either 2 or 4 headlights—be sure to match your configuration.
Are these good for daily driving?
Yes, they are designed for both daily driving and show builds, offering improved safety and long-term durability.
