Press release #Mobility Aftermarket

Bosch Ultra White range of halogen bulbs: daylight bulbs for better contrast

Higher color temperature results in improved light emission and even whiter, xenon-like light

  • Depending on headlight type, improved color temperature now ranges from 4,200 to 4,800 Kelvin, for more intensive, whiter light
  • Ultra White bulbs emit 40 percent more light than standard halogen bulbs
  • Extended Ultra White bulb range now available for nearly all front headlights of most vehicles with halogen headlights in Europe
Carolin Lüdecke

Carolin Lüdecke


Karlsruhe, Germany – With its Ultra White bulb range, Bosch offers an attractive halogen bulb with optical benefits similar to xenon bulbs. A particular advantage of xenon headlights is their similarity to daylight. However, their high price means that they are mainly installed in premium vehicles. With a color temperature that has now been improved to a range between 4,200 and 4,800 Kelvin, depending on headlight type, the Ultra White bulb range emits an especially intensive white light that comes close to daylight with 5,500 Kelvin. When driving at night, the light is more soothing for the eyes and causes less fatigue due to higher contrast. Emitting up to 40 percent more light, these intensively white bulbs also offer better vision than standard halogen bulbs – not only in the dark, but also in difficult weather conditions such as rain and fog.

Nearly 100 percent coverage of vehicles in Europe

In addition, the Ultra White bulb range has been extended. The halogen bulbs are now available for nearly every type of bulb used in front headlights, such as H1, H4, H7, H11, and W5W. They are available for use as high-beam, low-beam, fog light and parking lights.
With just five article numbers, Bosch can cover nearly all halogen headlight bulb types used in Europe, including hybrid and electric vehicles equipped with halogen headlights.

If Ultra White bulbs are used for all the main headlight functions, this creates a “xenon look”, which makes the vehicles look stylish and modern.

Bosch recommends regular replacement of bulbs

Bosch recommends replacing headlight bulbs every two years, and always in pairs. For installation clean gloves or a soft cloth is recommended, touching only the metal base of the bulb if possible. Otherwise, dirt and sweat can cause the glass cover to heat up unevenly, resulting in damages to the bulbs.

The Mobility Aftermarket division (MA) provides the aftermarket and repair shops worldwide with modern diagnostic and repair shop equipment and a wide range of spare parts – from new and exchange parts to repair solutions – for passenger cars and commercial vehicles. Its product portfolio includes products made as Bosch original equipment, products developed in-house and specifically manufactured for the aftermarket, as well as services. About 16,000 associates, as well as a global logistics network, ensure that spare parts reach customers quickly and on time. MA supplies testing and repair-shop technology, diagnostic software, service training, and information services. In addition, the division is responsible for the “Bosch Service” repair-shop franchise, one of the world’s largest independent chains of repair-shops, with some 13,000 workshops, and more than 1,000 “AutoCrew” partners in over 100 countries. In addition, with Bosch Classic, MA supports owners of classic cars with a wide range of spare parts and services.

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The Bosch Group is a leading global supplier of technology and services. It employs roughly 429,000 associates worldwide (as of December 31, 2023). The company generated sales of 91.6 billion euros in 2023. Its operations are divided into four business sectors: Mobility, Industrial Technology, Consumer Goods, and Energy and Building Technology. With its business activities, the company aims to use technology to help shape universal trends such as automation, electrification, digitalization, connectivity, and an orientation to sustainability. In this context, Bosch’s broad diversification across regions and industries strengthens its innovativeness and robustness. Bosch uses its proven expertise in sensor technology, software, and services to offer customers cross-domain solutions from a single source. It also applies its expertise in connectivity and artificial intelligence in order to develop and manufacture user-friendly, sustainable products. With technology that is “Invented for life,” Bosch wants to help improve quality of life and conserve natural resources. The Bosch Group comprises Robert Bosch GmbH and its roughly 470 subsidiary and regional companies in over 60 countries. Including sales and service partners, Bosch’s global manufacturing, engineering, and sales network covers nearly every country in the world. Bosch’s innovative strength is key to the company’s further development. At 136 locations across the globe, Bosch employs some 90,000 associates in research and development, of which nearly 48,000 are software engineers.

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