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LED Conversion Kits & Car LED Bulbs

Shop LED conversion kits and replacement bulbs for headlights, fog lights, turn signals, brake lights, reverse lights, DRLs, and interior lighting. Find bright, efficient options for cars, trucks, and SUVs, including CANbus-compatible bulbs for supported vehicle applications.
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With a 4.95 average rating across Google and Judge.me, Underground Lighting has earned the trust of drivers looking for dependable LED lighting upgrades. See why customers choose us for fitment support, quality products, fast shipping, and brighter lighting solutions for cars, trucks, and SUVs.

Complete LED Conversion Kits & Bulbs for Exterior and Interior Vehicle Lighting

Underground Lighting offers a premium collection of  LED conversion kits and LED replacement bulbs designed for headlights, fog lights, turn signals, brake lights, reverse lights, DRLs, and interior lighting. Using advanced LED (light-emitting diode) technology, these bulbs provide efficient illumination without the filaments or gas used in halogen and HID systems.

The collection features automotive-grade SMD LEDs and high-performance output chips, each selected for its application. Headlight bulbs are designed for accurate chip placement to maintain a focused beam pattern; fog-light bulbs provide wider light distribution, and signal bulbs prioritize fast response and clear on-off contrast.

Performance varies by product. Selected headlight kits may produce 6,000-12,000 lumens per pair while consuming only 40–60W, delivering up to  3–5× more usable light than standard halogen bulbs with efficient power consumption. Always check the specifications on the individual product page before ordering.

Compatibility, CANbus & Electrical Integration

Many modern vehicles use CANbus or bulb-monitoring systems that detect changes in electrical resistance. Since LED bulbs typically draw less power than halogen bulbs, some vehicles may display warning messages, flicker, pulse, or hyperflash after an LED upgrade.

This collection includes CANbus-compatible LED bulbs, anti-flicker resistor decoders, and plug-and-play load resistors designed to:

  • Help prevent dashboard error warnings
  • Reduce flickering, pulsing, or hyperflash
  • Support stable operation with compatible vehicle electronics

Products in this collection are designed for standard 12V automotive systems, with many plug-and-play options that require no cutting or permanent modification of factory wiring. However, compatibility varies depending on the vehicle, bulb position, and electrical system.

What This Collection Includes

LED Headlight Kits & Bulbs

Available in H1, H3, H4, H7, H9, H11, H13, 9004, 9005 (HB3), 9006 (HB4), 9007, 9012, 880/881, and H15 sizes.

Choose from single-beam and dual-beam options are available for low beams, high beams, DRLs, and combined high-low systems. These bulbs are designed to replace compatible halogen bulbs and use fixed or adjustable chip positioning to support proper alignment in projector and reflector housings.

LED Fog Light Bulbs & Kits

H1, H3, H8, H10, H11, 9006, 5202, 9140, 9145, PY13W, PSX26W, and 880/881.

Designed for low-mounted bumper applications, fog lights are available in white (around 6000K) and yellow (approximately 3000K–4300K) color temperatures. Yellow light can improve contrast and reduce glare in fog, rain, and snow, while white light provides a clean appearance and strong visibility in clear conditions or light mist. 

LED Signaling & Safety Lights

This collection includes turn signals, brake lights, tail lights, reverse lights, switchback bulbs, and CANbus-compatible sets. Many options provide instant illumination and clear contrast between running-light and signaling functions.

Interior & Auxiliary LED Lighting

Upgrade dome lights, map lights, trunk lights, license-plate bulbs, accent lighting, and Auxiliary LED Lighting with efficient options available in multiple bulb sizes and colors.

High-output LED bulbs generate heat around their base and electronic components. Depending on the product, heat is managed through aluminum heat sinks, active cooling fans, or hybrid cooling designs to help maintain stable output in confined housings.

Correct bulb positioning and beam alignment are essential for safe driving. Properly positioned LED chips help maintain a controlled beam pattern, while excessive brightness or poor alignment can create glare and reduce visibility in poor weather. For on-road use, always ensure that the bulb-and-housing combination produces a properly controlled beam pattern and complies with DOT, SAE, or other local requirements.

If you need help selecting the right LED bulb, contact the Underground Lighting team. We're happy to help you compare bulb types, features, and vehicle compatibility before you order.

Why Choose Underground Lighting LED Conversion Kits & Bulbs

  • 3–5× Higher Brightness With Controlled Output

    Underground Lighting LED bulbs deliver 6,000–12,000 lumens per pair, providing 3 to 5 times more usable light than standard halogen bulbs. Headlight options focus on controlled beam geometry, while fog-light bulbs use wider, lower patterns suited to their mounting position.

  • 25,000–50,000+ Hour Operating Lifespan

    Built with state-of-the-art LED technology, Underground Lighting’s bulbs are rated to last 25,000–50,000+ hours. Proper installation and effective heat management help maximize lifespan and reduce replacement frequency.

  • Instant Full Brightness With Zero Warm-Up

    Unlike HID, Underground LED lighting bulbs reach full 100% output instantly with no warm-up time. This provides faster illumination for brake lights, turn signals, reverse lights, and sudden nighttime driving situations without the warm-up period associated with HID systems.

  • Lower Power Draw With Higher Energy Efficiency

    Underground Lighting LED kits operate at approximately 40–60W per pair while converting more electrical energy into usable light. This helps reduce unnecessary demand on the battery and alternator compared with less efficient lighting technologies.

  • Shock- and Vibration-Resistant for Trucks & SUVs

    With no delicate filament, Underground Lighting LED bulbs are built to withstand vibration, rough roads, and repeated impact. This makes them a suitable option for trucks, SUVs, off-road vehicles, and everyday driving applications.

  • Error-Free Operation in Modern Vehicles

    CANbus-compatible Underground Lighting bulbs and available anti-flicker accessories help reduce dashboard warnings, flickering, and hyperflash in supported vehicles. Compatibility should still be confirmed because monitoring systems vary by make, model, year, and bulb position.

How to Choose the Right LED Lights for Your Car

Choosing the correct LED light bulbs for your car is easier when you follow these steps:

  1. Identify the bulb type you need: Check your owner’s manual or remove the existing bulb and read the part number printed on its base. Common exterior bulb sizes include 3157, 7443, and 1157, while interior lights commonly use wedge or festoon-style bulbs.
  2. Use our Vehicle Search Tool: Enter your vehicle’s year, make, and model to find bulb sizes listed for compatible lighting positions. Always compare the recommended fitment with the bulb currently installed in your vehicle.
  3. Choose the features that matter: Consider brightness, color temperature, beam pattern, switchback features, and CANbus compatibility. Some vehicles may also require a resistor or decoder. Our team is always here to help you find the right match. 
  4. Review the product details before ordering: Confirm the bulb size, quantity, color, polarity, connector style, and available installation space. Some headlight bulbs with cooling fans or large heat sinks may require additional clearance behind the housing.

Need help selecting the right option? Reach out to our lighting pros for help comparing bulb sizes, vehicle fitment, and electrical requirements.

Watch these helpful Underground Lighting videos for step-by-step guidance, product details, and real-world installation tips.

Looking to shop car LED lights that fit your vehicle?

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Car LED Lights FAQs

Many automotive LED bulbs are designed for plug-and-play installation, but the difficulty of access and installation varies by vehicle. Confirm the bulb size and polarity, disconnect the power where necessary, and test the light before reinstalling covers or trim.

A load resistor or decoder may be required if the new bulb flickers, hyperflashes, or triggers a dashboard warning.

A halogen bulb creates light by heating a filament, while an LED produces light electronically through semiconductor components. LEDs generally use less power, reach full brightness faster, and can provide a longer operating life. Performance still depends on the bulb design, cooling system, housing, and installation.

Car LED lights can range from budget-friendly replacement bulbs to higher-priced LED conversion kits, depending on the lighting position, brightness, bulb size, and built-in features. Small LED interior, marker, tag, and license plate bulbs usually cost less, while LED headlight kits, fog light kits, turn signal bulbs, brake lights, and vehicle-specific upgrades usually cost more.

The main price factors include lumen output, bulb color, CANbus compatibility, built-in resistors, anti-flicker support, cooling design, and whether you need a simple replacement bulb or a complete plug-and-play LED kit.

LED bulbs are available for headlights, fog lights, turn signals, brake lights, tail lights, reverse lights, license-plate lights, dome lights, map lights, and trunk lights. However, each lighting position may require a different bulb size, color, output, polarity, or electrical accessory.

LED bulbs use less electrical power than traditional halogen bulbs. Some vehicle monitoring systems interpret that lower power draw as a failed bulb, which can cause dashboard warnings, flickering, or hyperflash.

A compatible resistor or CANbus decoder can help replicate the expected electrical load.

Yes, individual LED bulbs and complete lighting kits can be used in the same vehicle as long as each component matches the correct voltage, connector, bulb position, and electrical requirements.

Check whether additional CANbus modules, resistors, or adapters are required for each lighting circuit.

Fitment depends on your vehicle’s year, make, model, trim, headlight package, and bulb position. Use the Vehicle Finder and compare the recommended bulb with the part number currently installed. Also check the available space inside the housing, particularly when selecting headlight bulbs with cooling fans or larger heat sinks.

LED bulbs normally use less power than comparable halogen bulbs, so they are unlikely to draw your battery power in normal conditions. However, any light left on while the engine is off can eventually drain the battery, including interior, accent, or auxiliary LED lights.

An LED bulb may physically fit a reflector headlight, but the beam pattern depends on how closely the LED chip position matches the original filament location. A poor match can create dark spots, scattered light, or glare.

Check the product’s intended housing type, align the bulb correctly, and verify the resulting beam pattern before driving. Exterior headlight retrofits should also comply with applicable road-use requirements in your location.

Start by checking the bulb number printed on your current bulb or by using your vehicle’s year, make, model, and lighting position. Common automotive LED bulb sizes include H11, H13, 9005, 9006, 3157, 7443, 1157, 921, 194, and many others.

Color also matters. Headlights are usually white; fog lights may be white or yellow; turn signals are commonly amber; brake and tail lights are usually red; and reverse lights are usually white. Choosing the correct bulb size and color helps improve fitment, function, and visibility.

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