35W CANbus HID Conversion Kits

An HID conversion kit is a headlight upgrade system that replaces a halogen bulb with an HID bulb. A complete HID kit typically includes HID bulbs, ballasts, igniters, and vehicle-ready wiring needed to power the system. The ballast starts and controls the HID bulb, allowing it to produce brighter light than a standard halogen filament bulb.

Technically, yes — 35W HID bulbs can be used with a 55W ballast. However, most HID light kits on the market operate at 35W because it is the industry standard that offers the best balance of light output, heat control, and bulb lifespan.

Xenon headlights, also known as High-Intensity Discharge (HID) lighting, use gas discharge technology instead of a filament. Rather than heating a tungsten wire like halogen bulbs, HID systems generate light through an electric arc inside a sealed quartz capsule filled with xenon gas and metallic salts. This process produces nearly three times more usable light than halogen bulbs at the same power level, resulting in longer beam distance, higher intensity, and improved visibility, especially when paired with projector headlights

Most HID Conversion Kits are designed to be universal, making them compatible with most vehicles factory-equipped with halogen headlights. Upgrading from standard halogen bulbs to HID headlights is also a popular way to significantly improve brightness, visibility, and overall lighting performance.

An HID system operates as a closed electrical circuit made up of coordinated components. During startup, the igniter produces a high-voltage pulse of around 23,000 volts to ionize the xenon gas and create an arc inside the bulb. Once ignited, the ballast regulates power at approximately 85V AC to maintain stable light output. This process explains the 10–30-second warm-up period unique to HID headlights.

An HID conversion kit consists of matched components designed to replace a halogen bulb. This includes HID bulbs to generate light, ballasts to regulate voltage and current, igniters to start the arc, and high-voltage wiring. In many modern vehicles, additional components such as CANbus cancellers or relay harnesses may be required to prevent flickering or bulb-out warning messages.

D-Series HID bulbs are OEM-style bulbs such as D1S, D2S, D3S, and D4S, commonly found in factory HID systems. Some include integrated igniters, while others require external igniters, and newer versions eliminate mercury for environmental compliance. H-Series bulbs, such as H1, H3, H7, H11, 9005, and 9006, are designed specifically for aftermarket HID conversion kits. They mimic the shape of halogen bulbs, allowing them to fit into halogen housings when paired with external ballasts.

Color temperature is measured in Kelvin (K) and describes the color of the light, not its brightness. 4300K produces a warm white light with the highest lumen output and best visibility in all conditions. 6000K offers a clean white appearance with slightly reduced output, while 8000K and higher introduce blue tones that reduce effective road illumination. Higher Kelvin ratings do not mean brighter light.

HID headlights produce intense light that must be properly controlled. Projector housings are designed to focus HID light using a cutoff shield and lens, resulting in a clean beam pattern with minimal glare. Reflector housings scatter HID light, often causing excessive glare for oncoming drivers. This is why HID kits installed in halogen reflector housings are typically not DOT- or SAE-compliant.

HID conversion kits are commonly installed on vehicles like the Ford F-150, Ram 1500, and Jeep Grand Cherokee, especially trims equipped with projector headlights. Compatibility depends on bulb size, housing type, CANbus system presence, and electrical stability rather than vehicle brand alone. Incorrect fitment is the most common cause of flickering, error codes, and premature failure.

At Underground Lighting, we offer a range of premium HID conversion kits to suit a variety of vehicles and needs. Popular options include standard 35W HID kits for reliable performance and advanced CANbus HID kits for modern vehicles. Best sellers include our H1 High-End 35W HID Kit and the H1 HID 35W Canbus Error-Free and Flicker-Free Kit. Our lighting experts are always available to help you choose the right setup.

Plug-and-play HID conversion kits are designed for easy installation. Simply remove your factory halogen bulbs, install the HID bulbs, connect them to the ballasts, and secure the wiring. No cutting or splicing is required. This quick upgrade instantly improves both the appearance and performance of your vehicle’s headlights.

HID conversion kits typically cost around $119.99–$199.99, depending on the bulb size, beam type, CANbus compatibility, and vehicle-specific application. Most 35W CANbus HID headlight conversion kits cost more than basic replacement bulbs because they include HID bulbs, ballasts, wiring connections, and electronics designed to help reduce flickering and bulb-out warnings.