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Superior Low-Beam Visibility: Advanced 2-diode LED optics deliver a crisp, focused beam pattern that improves roadside recognition without blinding oncoming drivers.
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Heavy-Duty Construction: Durable die-cast aluminum housing acts as an efficient heat sink while defending internal components against vibration and impact.
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Shatter-Resistant Lens: Impact-resistant clear polycarbonate lens protects against rock chips, road debris, and weathering.
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Multi-Voltage Compatibility: Supports 12V to 24V DC electrical systems, making it adaptable across a wide range of light, medium, and commercial heavy-duty trucks.
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Plug-and-Play Retrofit: Hardwired lead paired with an H4 3-blade plug directly replaces standard H4656 halogen sealed beams for fast installation.
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Energy Efficient Draw: Low power consumption (1.13A–1.98A @ 12.8V) minimizes strain on your vehicle's alternator and battery system.
SKU
37640C
Manufactures SKU
TRUCK-LITE 37640C
Truck-Lite 37640C – 37 Series 4" x 6" Rectangular Low Beam LED Headlight (2-Diode, Clear Polycarbonate Lens, Hardwired)
$173.50
EA
Upgrade your fleet’s night visibility and road safety with the Truck-Lite 37640C 37 Series 4" x 6" Low Beam LED Headlight. Engineered for heavy-duty commercial trucks, medium-duty fleets, and off-road vehicles, this direct-fit LED replacement lamp offers crystal-clear forward illumination while drastically reducing electrical draw.
Built with a rugged die-cast aluminum housing and an impact-resistant clear polycarbonate lens, the 37640C is designed to withstand harsh road vibration, severe weather, and debris. Featuring advanced 2-diode LED optics and a hardwired pigtail with a standard H4 3-blade connector, this light seamlessly replaces traditional halogen ANSI # H4656 sealed beam lamps.
Key Details
Beam Pattern
Low
Brand
TRUCK-LITE
Common Size
4 x 6
Current Major Amp
1.13A-1.98A @ 12.8V 0.59A-1.29A @ 25.8V
Housing Material
Die-Cast Aluminum
Lamp Connection
Hardwired
Lens Color
Clear
Lens Height
0.7
Lens Material
Polycarbonate
Lens Shape
Rectangular
Lens Width
4.2
Lighting Technology
LED
Number of Diodes/Bulbs
2
Number of Wires
3
Plug Side One
Hardwired
Plug Side Two
H4 Connector
Product Type
Headlamp
Sealed/Bulb Replaceable
Sealed
Series
37 Series
Wire Gauge
16
Shipping Weight (lbs)
1.250000
Total Height
4.2
Total Width
6.6