BICYACO 4x6 LED Headlights 4-Pack — 6500K DOT Rectangular Replacement for H4651/H4652

BICYACO 4x6 DOT LED headlights are a plug-and-play, waterproof replacement set designed to deliver bright, crisp 6500K illumination for classic trucks and many 4x6 headlight vehicles.

These four 4x6-inch rectangular LED units replace legacy sealed-beam fittings (H4651/H4652/H4656/H4666/H6545) and are engineered to meet DOT requirements while offering long life, efficient heat management, and integrated anti-flicker electronics. Built with an aluminum alloy housing and IP67-rated sealing, they are intended for heavy-duty use on trucks, commercial rigs, and older cars that accept 4x6 headlights.

How bright are these lights and what color does the beam produce?

The BICYACO lights produce a 6500K color temperature, giving a crisp, pure white beam that improves contrast and road detail in low-light driving. They offer distinct high and low beam functions with a defined cutoff to reduce glare for other drivers.

• 6500K pure white LED output for clearer nighttime visibility
• Separate high/low beam functions built into each unit
• Sharp cut-off line to limit glare for oncoming traffic
• DOT-compliant brightness suitable for U.S. and Canadian roads

Will these fit my vehicle and how easy is installation?

These 4x6 LEDs are designed to directly replace most standard 4x6 sealed-beam headlights used on models like Kenworth, Peterbilt, Freightliner, and many Chevy trucks and SUVs. They come with H4 (9003/HB2) wiring harnesses and installation instructions for a straightforward, roughly 20-minute swap per lamp in most vehicles.

• Compatible with H4651/H4652/H4656/H4666/H6545 mounting patterns
• Included H4 wiring harnesses for plug-and-play connection
• Integrated anti-flicker circuitry—no extra modules typically required
• Installation generally requires basic hand tools and minimal time

How durable are the headlights and what environmental protection do they offer?

The housings use aluminum alloy with a heat-dissipating design to extend LED life up to 50,000 hours under normal use. An IP67 waterproof rating means the lamps resist dust and withstand immersion to one meter for short periods, making them suitable for heavy-duty and seasonal conditions.

• Aluminum-alloy body with heat-dissipation fins for thermal reliability
• IP67-rated sealing for robust water and dust protection
• Rated lifespan up to approximately 50,000 hours
• Designed to operate in cold, wet, and road-splashed environments

What does the package include and are there any legal or compatibility notes?

The set ships with four 4x6 LED headlights, one printed instruction sheet, and four H4 (9003/HB2) wiring harnesses to simplify installation. They are DOT approved for on-road use in the U.S. and Canada; always confirm vehicle fitment and local regulations before purchase.

• 4 × 4x6 LED headlight units
• 4 × H4 (9003/HB2) wiring harnesses included
• 1 × installation instruction sheet
• DOT-compliant for U.S. and Canadian road use—verify local rules

Who is this for: These BICYACO 4x6 LED headlights suit owners of classic trucks, commercial rigs, and older passenger vehicles using 4x6 sealed-beam lamps who want a reliable, brighter LED upgrade. They are particularly useful for fleet operators, restoration projects, and drivers seeking improved nighttime visibility with a plug-and-play installation and strong weather resistance.