D2R 4300K are high-quality xenon bulbs for vehicles with reflector optics (without lenses), providing 15% increased brightness compared to original Osram or Philips bulbs. These bulbs are designed to replace burnt-out standard light sources in Volvo, Mercedes and other makes equipped with factory xenon lighting in reflector headlights. The bulb features a special shade/curtain on the glass, which effectively cuts off the blinding light beam, prevents dazzling oncoming drivers, and ensures a correct cut-off line. It is important to note that installing visually similar D1S bulbs, which lack such a shade, will result in the vehicle failing its technical inspection (MOT). Available for order individually (30 EUR per bulb) or in an economical set of 2 bulbs for 50 EUR.

We strongly recommend choosing xenon bulbs with a color temperature of 4300K (Kelvins). This is due to a number of important technical and physiological factors:
- All European car manufacturers equip their vehicles at the factory with xenon bulbs precisely at 4300K.
- In most European countries, the use of xenon bulbs with a color temperature above 5000K is legally prohibited.
- Light with a temperature of 4300K most accurately corresponds to the brightness of the morning sun (before noon), providing natural and comfortable color rendering. Meanwhile, 5000K light is similar to bright midday summer sun, which can distort color perception and create additional strain on vision when assessing the road situation.
- The human brain most comfortably perceives objects illuminated at night by 4300K light. With such light, colors retain their naturalness: grass is green, old asphalt is gray, new asphalt is black. Other color temperatures distort real colors, causing subconscious tension, leading to discomfort and rapid driver fatigue.
- Bulbs with a temperature of 4300K have the maximum luminous efficacy (brightness), measured in Lumens (Lm).
Comparative table: Bulb brightness depending on color temperature
| Bulb Type / Power |
Color Temperature (K) |
Luminous Flux (Lm) |
Light Color |
| Halogen Bulbs / 55W |
3000 |
~1500 |
Yellow |
| Xenon Bulbs / 35W |
4300 |
~3200 |
Warm White (Recommended) |
| 5000 |
~3000 |
Cool White |
| 6000 |
~2400 |
White with Blue Tint |
| 7000 |
~1800 |
Blue |
| 8000 |
~1500 |
Blue-Blue |
As can be seen from the table, 4300K xenon bulbs are almost 2 times (100%) brighter than standard halogen bulbs, while their power consumption is 26% lower (35W vs 55W). This provides not only excellent road visibility but also reduces the load on the vehicle's electrical system.
Debunking the Heating Myth
There is a common misconception that xenon bulbs heat the headlight significantly less than halogen bulbs, and therefore the reflector of xenon optics is less prone to burning. This is not true. Reflectors of both xenon and halogen optics fade over time due to long-term operation and exposure to ultraviolet light. The difference in heating of the optics itself from these types of bulbs is minimal. The burning temperature of a halogen bulb filament (55W) nearby is about 410°C, while the temperature of a xenon arc is about 390°C. The difference is only 5%, which does not significantly affect the lifespan of the reflector.
Video Review and Features
Check out a visual review of the D2R 4300K xenon bulb to better understand its design and advantages:
Key Advantages of the D2R 4300K Xenon Bulb:
- Increased Brightness (+15%): Provides better illumination of the road surface compared to standard bulbs.
- Factory Compliance: A complete analog of original bulbs with the correct cut-off line thanks to the shade on the glass.
- Energy Efficiency: 35W power vs 55W for halogen bulbs reduces the load on the alternator and wiring.
- Long Service Life: Xenon bulbs last significantly longer than halogen ones.
- Comfort and Safety: Natural white 4300K light reduces eye strain and improves perception of the road situation at night.
- Legality: Full compliance with European standards, guaranteeing passage of the technical inspection (MOT).
Choose high-quality D2R 4300K xenon bulbs for your Volvo, Mercedes, or other vehicle with factory xenon – it's a guarantee of bright, safe, and legal lighting.