The Philips Ultinon Pro9100 HL LED bulbs are specifically designed for use in vehicles and offer innovative lighting technology that ensures improved visibility and safety while driving. This set consists of two H11 bulbs suitable for headlight applications and supports an input voltage of 12 to 24 volts. The bulb base is of type PGJ19-2, allowing for easy installation in compatible vehicles. It is important to note that these car bulbs are not approved for road use and should only be used for off-road applications. The LED technology provides a longer lifespan and higher energy efficiency compared to traditional halogen bulbs. With their modern design and high light output, the Philips Ultinon Pro9100 HL LED bulbs are an excellent choice for those who value quality and performance.