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Electromagnetic interference, or EMI for short, occurs wherever electrical consumers are involved. Vehicle lighting is also affected: headlights can cause interference, but they can also fall victim to external influences themselves. Anyone who thinks this is only a theoretical problem is mistaken. In everyday life, radio signals from smartphones or radios are enough to throw inadequately tested lights out of sync. ...

You know that feeling when a technical term makes your head spin? No more of that! Our technical and advisory glossary helps. ...

In the past, the world was still simple. The brightness of a spotlight was given in watts and everyone knew how bright it was. Or at least thought they did. But today you only find information in lumens, candela and lux. What is that actually? ...

Everyone has seen water or steam in headlamp housings. The logical assumption is, of course, that the headlight is simply leaking and therefore defective. But this is not necessarily the right explanation, because even high-quality headlamps with a high structural tightness can show this effect. Especially with modern LED headlights, this seems to occur more frequently.