This Underground Lighting collection is dedicated exclusively to the D5S bulb, a mercury-free Xenon HID headlight bulb engineered as a self-contained HID lighting system. Unlike traditional HID formats such as D1S, D3S, or D4S, the D5S Xenon HID bulb integrates both the igniter and ballast directly into the bulb assembly, eliminating the need for an external ballast or additional wiring.
The D5S bulb operates on a 42V AC electrical system at 25W nominal power, making it electrically and mechanically incompatible with 35W HID systems. This lower-wattage design is intentional, allowing D5S bulbs to function safely within compact OEM projector or hybrid lens headlamp modules commonly used in late-model sedans and SUVs. The bulb uses a PK32d-7 indexed twist-lock base, which defines housing compatibility and prevents incorrect installation into D1, D3, or D4 sockets.
A defining characteristic of the D5S Xenon HID bulb is its mercury-free construction, ensuring compliance with RoHS environmental standards and modern DOT / ECE lighting regulations. This eco-compliant design is increasingly required in newer vehicles across regulated markets and supports easier disposal and long-term regulatory compatibility.
This collection includes:
- D5S 6000K Xenon HID Headlight Bulbs (25W), sold as a matched pair for OEM replacement
Typical light output for D5S bulbs is approximately 2000–2400 lumens per bulb, reflecting the reduced 25W power rating. While this output is lower than traditional 35W HID systems, it still exceeds halogen performance and meets OEM minimum safety illumination standards when paired with the correct projector optics. 4300K remains the OEM baseline for maximum effective visibility, while 6000K aftermarket variants provide a cleaner white beam with a trade-off in usable lumen efficiency.
D5S bulbs are most commonly used as OEM low-beam headlights, installed in vehicle-specific projector systems found in select Chrysler, Jeep, Ford, Hyundai, GM, and other late-model platforms. Because the ballast is non-modular and permanently integrated, D5S systems are not upgradeable to higher-wattage HID or retrofit LED solutions. Replacement requires a direct D5S bulb swap, using the factory plug harness and twist-lock collar to maintain proper arc alignment and beam cutoff.
This category supports OEM-correct D5S bulb replacement through Underground Lighting, focusing on electrical stability, housing-matched optics, and long-term compliance rather than raw lumen output.
Explore our carefully curated HID collection of bulbs & ballasts, and LED collection of fog lights, turn signal lights, and switchback turn signal lights, and confidently select the right option by using our compatibility bulb finder.
