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The development of headlamps was found to experience a dynamic process. For more than 50 years the tungsten double filament bulbs (Bilux) had been dominating the lighting technology, followed in the seventies by the H4 bulb. Since the middle of the eighties the modern filament bulbs as H7 (now H9, H11) have been available. The Xenon gas discharge (or HID-) technology reached the automotive market in the nineties. Now the development is heading towards the new technology step. Adaptive „intelligent“ headlamps will bring the headlamp from its isolation in the front module back into the world of electronics and car networking systems.

High intensity discharge lights (HID) are the innovation step that is now beginning to penetrate in all car classes. Investigating drivers, all results show that the benefits are visible to them and positively accepted. The quantification of the improvements has yet been insufficiently examined. In this article some of the aspects will be highlighted.