Big Energy H4 LED Conversion Kit — 1550/800 lm 5700K (12/24V)
(High & Low Beam)

Upgrade your vehicle’s lighting with the Big Energy H4 LED conversion kit, designed to deliver brighter, clearer illumination with simple, plug-and-play installation. This kit replaces traditional halogen bulbs and provides both high and low beam functionality in one unit, improving visibility and driving safety in all conditions.

With a crisp 5700K daylight-white output, a fanless silent design, and durable IP67-rated construction, this kit is built for long-term reliability with a lifespan of up to 50,000 hours.

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Key Features

• H4 LED conversion kit (sold as a pair)
• Dual beam: High and low beam functionality in one bulb
• Bright output: 1550 lm (high beam) / 800 lm (low beam) per bulb
• 5700K daylight white for improved clarity and contrast
• 12–24 V compatibility — suitable for cars and commercial vehicles
• Fanless design for silent operation
• IP67 rated — resistant to dust and water
• Long lifespan: up to 50,000 hours
• Compact design for easy installation

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Performance & Benefits

This kit delivers a focused and efficient beam pattern, improving visibility at night and in poor weather conditions. The daylight-white colour temperature enhances contrast and reduces eye strain, contributing to safer and more comfortable driving.

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Installation & Compatibility

• Connector type: H4 — direct replacement for H4 halogen bulbs
• Optimised compact design for tight headlight housings
• Suitable for both 12V and 24V systems

Note: Some vehicles may require a CAN bus decoder (e.g. Big Energy Part No. 901006) to eliminate dashboard warning messages.

CLICK HERE FOR CANBUS DECODER FOR H4 BULBS

CLICK HERE FOR THE BIG ENERGY LED BULB INSTALLATION GUIDE

CLICK HERE FOR THE BIG ENERGY BULB RANGE SPECIFICATIONS SHEET

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Technical Specifications

General

• Unit: Pair
• Functions: High beam / Low beam

Electrical

• Voltage (DC): 12–24 V
• Power consumption:
  • High beam: 12 W
  • Low beam: 8 W

Lighting Performance

• Luminous flux:
  • 1550 lm (high beam, actual per bulb)
  • 800 lm (low beam, actual per bulb)
• Color temperature: 5700 K

Connection

• Type: H4 connector

Construction & Durability

• IP rating: IP67
• Lifespan: up to 50,000 hours
• Cooling: Fanless (silent operation)

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Important Information

• Confirm your vehicle uses H4 fittings before purchase
• A CAN bus decoder may be required for some vehicles
• Not E-approved — check local regulations before road use

Retrofit, auxiliary and replacement lights and electrical components for Scania, Volvo, MAN, DAF, Hino, Iveco, Renault and Mercedes trucks and haulage vehicles; emergency, commercial vehicles and tractors. We serve Ireland, Northern Ireland, Great Britain/The UK and Europe. To find and purchase products wholesale (contact us) and retail, and to view our current for sale, discounted and clearance offers please go to the home page.