OSRAM Xenarc D3S Cool Blue 66340CB 2-Pack 35W 5500K Xenon Headlight Bulbs — 3200 lm, Made in Germany

If you want xenon headlights that combine a striking cool-white tone with reliable performance, these OSRAM Cool Blue D3S bulbs offer a premium, OEM-grade option. Made in Germany and sold as a two-pack, the 66340CB model produces around 3200 lumens each and uses OSRAM’s advanced filling process to create the characteristic cool-white appearance without surface coatings.

How bright and what color temperature can I expect?

These D3S xenon bulbs produce strong, directional light that reads as cool white with a slight blue tint around 5500 Kelvin—visually whiter than traditional 4300K xenon lamps. Measured luminous output is about 3200 lumens per bulb, which yields noticeable contrast and improved signaling to other road users.

• Color temperature: approximately 5500K for cool-white appearance
• Light output: ~3200 lumens per bulb (±15%)
• Power: 42V, 35W standard HID rating
• Rated life: around 3000 operating hours

Will these fit my car and are they legal for road use?

The OSRAM Xenarc D3S Cool Blue bulbs use the D3S base (PK32d-5) and are intended for vehicles specified to accept D3S xenon lamps. They are designed for on-road use when installed in compatible headlamp systems; always confirm your vehicle’s factory bulb type before buying.

• Bulb size: D3S only — not compatible with D1S or D8S sockets
• Base type: PK32d-5 (verify physical fit in your headlamp housing)
• Legal status: road-legal when fitted to correct OEM HID systems
• MPN: 66340CB — check against manufacturer specifications

What makes the Cool Blue version different from other xenon bulbs?

Rather than using an external coating, the Cool Blue version achieves its cool-white hue through a specialized filling process that affects the discharge spectrum. That produces the distinctive cooler tone while maintaining high luminous intensity—giving a modern look without compromising light output.

• Special internal filling yields the cool-white visual effect
• No exterior coating required, reducing coating deterioration risks
• Produces higher-contrast light that stands out visually to other drivers
• Color appearance may shift over the bulb’s life as is normal for HID lamps

Who is this for: Drivers who want a premium, factory-level xenon upgrade with a crisp, cool-white appearance and proven OEM quality. These bulbs suit owners of vehicles specified for D3S xenon systems who expect strong light output, a modern aesthetic, and German-made manufacturing. If your car requires a different HID type (D1S, D2S, D8S), choose the matching bulb size instead. Always replace HID bulbs in matched pairs when possible and verify compatibility with your headlamp ballast and housing before installation.