4x6 6x4 Black LED Headlights H4 Sealed Beam - Bright Truck Fit

In this review the reviewer examines a set of TRUE MODS 4in x 6in LED headlights aimed at truck owners and classic vehicle restorers who need a direct replacement with modern LED performance. The bottom line is straightforward: these lights deliver a substantial improvement in nighttime visibility and modern styling, with a clean black face, bright DRLs and a robust cast aluminum housing that feels built for heavy use. For anyone replacing H4651/H4652 style sealed beams on Peterbilt, Kenworth or Freightliner models, the lights are worth considering for light output and durability.

Key Features

• High output: 9,600 lumens of 6500K pure white light provide clearer road illumination for safer nighttime driving.
• Street legal design: The 4in x 6in sealed beam form factor replaces common H4651/H4652-style bulbs while keeping legal on-road performance.
• Durable construction: Rugged cast aluminum body and polycarbonate lens resist heat and impact for long service life in commercial use.
• Low power draw: At about 1.8 amps @ 12V the LED heads reduce electrical load compared with older halogen sealed beams.
• Versatile fit: Compatible with many semi-truck models and classic vehicles that use the H4 2a1 1a1 base, easing installation for fleets and hobbyists.

Who It's For

These LED headlamps are best for owners of Freightliner Classic XL FLD 120, Peterbilt 379, Kenworth T600/T800/W900 series and other heavy trucks who want a bright, modern upgrade without changing housings. They also suit classics and light trucks that accept 4in x 6in rectangular sealed beam replacements and where a clean black face and DRLs are desired.

Shoppers who prefer OE-original halogen color or need confirmed plug-and-play wiring adapters for unusual harnesses should check fit carefully; a few buyers reported compatibility issues. If you must match a factory chrome look or need a specific certified beam pattern for specialty applications, consider other options.

Pros & Cons

Pros

• Excellent perceived brightness and long beam range for safer highway driving.
• Solid build quality with cast aluminum housing and durable polycarbonate lens.
• Low current draw that can ease stress on older vehicle electrical systems.
• Attractive black face and DRL styling improves the vehicle's appearance.

Cons

• Some buyers reported fit or plug compatibility issues with nonstandard housings or older connectors.
• The very bright 6500K tint may feel harsh compared with warmer halogen lighting for some users.

Specifications

Our Verdict

These 4in x 6in LED headlamps deliver a meaningful upgrade in brightness, durability and styling for truck drivers and classic vehicle owners seeking a direct sealed beam replacement. They represent good value for those who need improved night visibility and a rugged build, but buyers should verify plug and housing compatibility before purchasing to avoid installation surprises.

Frequently Asked Questions

Will these fit my Peterbilt 379?
Yes, they are listed as compatible with Peterbilt 379 and many other models that use the 4in x 6in sealed beam form.

Do they draw more power than halogen?
No, these LEDs draw less power, around 1.8 amps @ 12V, which is lower than many halogen sealed beams.

Are they street legal?
The design is described as street legal for sealed beam replacement applications, but confirm local regulations if you have specific compliance concerns.