日行灯有什么作用?
[{"content":"[_LinkTopic:提问打卡·64倍车币翻不停,47011,37]经常看到许多车大白天亮着灯,即所谓日行灯。\n请问车友,大白天光线好,亮着日行灯有必要吗?日行灯具体起什么作用?","height":0,"order":1,"type":1,"width":0},{"content":"https://img3.baa.bitautotech.com/img/V2img3.baa.bitautotech.com/dzusergroupFiles/2021/12/27/13f3a73f43594cebbc236d2d84f5a922_800_0_max_jpg.jpg","height":1120,"note":"","order":2,"path":"/2021/12/27/13f3a73f43594cebbc236d2d84f5a922.jpg","type":2,"width":1984}]