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Headlight technology explained: from Xenon and LEDs to laser and halogen

[2019.11.08, Fri 12:03] Halogen light bulbs are fairly easy to replace and tend to output about 1000 hours of light before the globes expire and need to be swapped. Halogen lights are being phased out in favour of alternatives because they are no longer the most efficient or brightest form of lighting, but they are still one of the cheapest. They're preferable thanks to their longer lifetime compared with halogen headlights and are more efficient as they create more light from less energy. Only one or two of the most powerful LEDs are required to equal xenon light output but, increasingly, many smaller LEDs are being grouped together to create a more substantial and variable field of light. A major advantage of LEDs is that each one in a headlight array can be energised independently, allowing different shaped light beams which is useful for reducing glare to oncoming motorists or providing a more intense focused beam. Laser headlights - sounds cool, but in reality, the laser beams themselves only go part of the way to lighting up your surroundings. Like all lighting technology over the ages, the cost of the latest systems will decrease over time and find its way into increasingly affordable cars, making way for the next brilliant innovation.
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