The main difference is that instead of relying on low-pressure mercury vapour in a longish twisted tube, the HIDs in headlamps use xenon gas under high pressure in a tough little quartz package.

• 主要区别在于取代了在狭长螺旋灯管中的低压汞蒸汽，HIDs的前大灯使用石英封装的高压氙气。