认识灯具的构造前大灯:主要照明作用前大灯是最重要的照明灯具,交通法规里对大灯的光度、照射范围都有要求,照明的效果直接影响到您和其他人的交通安全。大灯主要有封闭式和灯泡可更换式两种。封闭式是指灯泡和透镜、灯罩做成一个整体,便于整个灯具大量生产,大部分微型车和商用车的方形灯、圆形灯都是封闭式的。轿车的大灯多为不规则形状,不利于制成封闭式,所以运用灯泡与 Understand the lighting structure of the headlight: the main lighting effect is the most important headlight lighting, traffic regulations on the headlight luminosity, the scope of the radiation requirements, the lighting effect directly affects you and others traffic safety. There are two main types of headlamps and light bulbs. Closed is the light bulb and lens, lampshade made a whole, easy to mass production of the entire lamp, most of the mini-cars and commercial vehicles, square lights, circular lights are closed. Most of the car’s headlamps irregular shape, is not conducive to making closed, so the use of light bulbs and