Everything You Need to Know About LED Headlight Conversion Kits

Reviewed by

Anthony Harlin, ASE Certified Master Automobile Technician

Technical Reviewer at CarParts.com

Written by CarParts.com Research Team - Updated on October 25th, 2024

Reading Time: 4 minutes
Summary
  • LED headlight conversion kits contain everything you need to convert your headlights from halogen to LEDs.
  • While it’s possible to buy the parts needed for conversion separately, these kits make it easier to do the job yourself.
  • A standard headlight conversion kit typically includes LED bulbs, heat diffusers, fans, current regulators, error cancellers/decoders, and an instruction manual.

LED headlights are more powerful than stock halogen lights. They provide better illumination and a longer lifespan compared to other bulb types. As such, some car owners have opted to make the switch.

While it may sound tricky to change the headlights yourself, there are DIY LED conversion kits that can help you get the job done.

What Is an LED Headlight Conversion Kit?

A LED headlight conversion kit has everything you need to properly convert the headlight from halogen to LED. It usually contains a set of LED bulbs, ballasts, and wiring harnesses to allow for easy installation and compatibility with the vehicle’s headlight system.

Ensure you research the brand and model kit you’re looking at because some vehicles require specialized tools. It’s also a good idea to check the reviews to see if previous consumers were satisfied with their purchase.

A LED headlight conversion kit has everything you need to properly convert the headlight from halogen to LED.

Does Headlight Conversion Require a Kit?

Converting your headlights into LED doesn’t necessarily require a kit. You can still manually replace the bulbs using parts that were individually bought. However, using a kit lets you purchase everything you need in one go.

Additionally, conversion kits make it easier for you to install the new bulbs. These kits ensure the new bulbs fit correctly in your vehicle without professional assistance.

Some kits also offer customizability, letting you choose between different color temperatures.

Some Things to Consider Before Converting Your Headlights

Here are some of the pros and cons of making the switch to LED headlights.

No Reflector Support

Halogen headlights use reflectors to direct light toward the front of the vehicle. Some LED headlights don’t come with reflectors, so they may not illuminate as brightly as your original stock headlights.

Buy LED headlights with reflectors to ensure they shine where you need them on the road.

Do note that LED reflectors need to be smaller and differently arranged. Otherwise, the light won’t focus properly. This is because halogens are larger light sources that require different mirror geometry.

LED Requires Additional Equipment

Unlike halogen bulbs that can be installed on a plug-and-play basis, LED bulbs require additional equipment to function without overheating. When switching your headlights to the latter, you may need to install a headlight relay and heat sinks.

Relays are electromagnetic switches that use low current to control a higher current circuit. Two relays typically control the headlights.

Meanwhile, heat sinks are cooling solutions for LEDs since they’re thermally low-efficient, structurally heavy, and space-intensive. Heat sinks control the temperature of LED bulbs to maintain their monochromaticity, intensity, and longevity.

Installing LEDs may also require splicing wires, which could void your warranty.

LED Headlights Can Be Expensive

LED bulbs are generally more expensive than your typical halogen bulb. While some go for as low as $100, high-end brands can cost up to $900.

Their long lifespans make up for the initial cost of purchase. A properly installed LED bulb can last up to 50,000 hours, a far cry from the 500-hour lifespan of halogen lights.

Potential Electrical Issues

Some modern cars have a CAN bus system that enables the ECUs to communicate with one another without the need for complicated wiring. Aftermarket LEDs may interfere with the operation of this system.

Installing a standard LED bulb without a load resistor may result in an active “bulb out” indicator on the dashboard since the power draw is too low for the system to register.

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What’s Included in a Headlight Conversion Kit?

A standard headlight conversion kit typically includes LED bulbs, heat diffusers, fans, current regulators, error cancellers/decoders, and an instruction manual.

Heat Diffusers

Some kits include heat diffusers that allow for proper heat dissipation. This process is crucial since LEDs are sensitive to heat. Using diffusers prolongs the lifespan of LEDs while maintaining performance.

Fans

Fans are included to control the bulbs’ temperature, prolonging their lifespan.

Current Regulators

LEDs don’t consume that much power, so regulators are included to maintain the voltage and current flowing to the bulbs

Error Cancellers/Decoders

Error cancellers/decoders show the error and give warnings required for mechanics.

Instruction Manuals

Some LED headlight conversion kits come with instructions for properly installing the new LED headlights.

How Much Do LED Headlight Conversion Kits Cost?

The price of LED headlight conversion kits depends on a handful of factors, such as the brand, series, and inclusions. It typically costs somewhere around $250. Some kits cost less, especially those that only include bulbs and basic installation tools.

Get Headlight Conversion Kits for Better Visibility

LED bulbs are superior to halogen bulbs because they release a lot more light and illuminate the road better. Unfortunately, not all headlights can support LED bulbs because they’re designed with halogen bulb sockets. If you’re intent on upgrading your headlights to have LED bulbs, you might need a headlight conversion kit. Luckily, shopping for a headlight conversion kit is easy and convenient here at CarParts.com.

CarParts.com has strategically located warehouses around the US, allowing us to ship your new headlight converter kit quickly after checkout. You can expect your new headlight conversion kit to arrive in as fast as two business days. We even accept returns up to 60 days after purchase in case you aren’t completely satisfied with the kit.

Make sure your vehicle can use LED bulbs to improve visibility at night. Order a headlight conversion kit from CarParts.com today.

Reviewed By Anthony Harlin, ASE Certified Master Automobile Technician

Technical Reviewer at CarParts.com

Tony Harlin is a Master Gas and Diesel Diagnostic Technician with over 18 years of experience. He works full-time at a large independent automotive shop as a driveability and repair technician working on all types of vehicles with a focus on diesels. ASE certifications include A1-A9, L1 and L2, as well as X1.

Written By CarParts.com Research Team

Automotive and Tech Writers

The CarParts.com Research Team is composed of experienced automotive and tech writers working with (ASE)-certified automobile technicians and automotive journalists to bring up-to-date, helpful information to car owners in the US. Guided by CarParts.com's thorough editorial process, our team strives to produce guides and resources DIYers and casual car owners can trust.

Any information provided on this Website is for informational purposes only and is not intended to replace consultation with a professional mechanic. The accuracy and timeliness of the information may change from the time of publication.

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Published by
CarParts.com Research Team and Anthony Harlin, ASE Certified Master Automobile Technician