Headlight D1S bulb Ledvance 66140ULT-2HB 35W 4200K

The Ledvance D1S 35W 4200K xenon headlight bulb is designed as a direct replacement for vehicles that require D1S HID lamps. Delivering neutral white light at a color temperature of 4200 K, this bulb provides improved forward illumination while maintaining OEM-style fit and standard 35 W power consumption. It is intended for headlight retrofit or replacement in compatible cars and matches the electrical and mechanical interfaces used in factory HID systems.

Advantages

This D1S bulb offers consistent color rendering and stable luminous output appropriate for use in xenon headlight units. The neutral white 4200 K tone balances visibility and contrast on the road without appearing overly cool or warm. With standard 35 W power draw it integrates with existing ballast and wiring designed for D1S HID systems, simplifying replacement and minimizing adjustments.

Suitable for

• Replacement of D1S HID headlight bulbs in compatible cars
• Headlight retrofit projects where OEM-fit xenon lamps are required
• Drivers seeking neutral white illumination for improved road visibility

Key specifications

• Light source type: Xenon (HID) D1S form factor
• Rated power: 35 W
• Color temperature: 4200 K (neutral white)
• Application: Low beam or high-intensity discharge headlight units
• Mechanical fitment: OEM-compatible D1S base and shape

How to use

Install the bulb only in vehicles specified for D1S xenon lamps and ensure the ignition is switched off before handling. Access the headlight housing according to the vehicle manufacturer’s instructions, remove the old bulb carefully, and avoid touching the glass envelope with bare hands. Secure the Ledvance D1S bulb into the socket and ensure the connection to the vehicle ballast is correct. After installation, test the headlights to confirm correct operation and beam alignment; if necessary, perform beam adjustment following the vehicle’s alignment procedure.

Recommendations

Handle the bulb with gloves or a clean cloth to prevent contamination of the glass. Use only compatible ballasts and wiring harnesses designed for D1S HID systems. If flickering or error messages occur after installation, verify connections and ballast compatibility or consult a qualified technician for diagnostics and alignment.