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Xenon headlights first illuminated in 1991 on a BMW. And since then, the controversy has been raging ever since: some praise the new best d3s bulb, while others curse it. And both sides are right. First, let's hear the arguments for. So, the xenon light is more than twice as bright as the halogen light: 3200 lm of luminous flux versus 1500 lm for the best H7 specimens. Xenon lamps are also much more economical: they provide 91 lm per watt versus 26 lm/W of halogen. This allows you to spend 35 watts per headlight instead of 55 watts. In addition the new xenon lamps have a life of 2000 hours compared with 450-500 hours of halogen lamps. They are not afraid of vibration as the plasma arc cannot be shaken off like a filament hair.