正式说说灯光升级的问题  方案有以下几种
1.原车不带透镜直接更换氙气灯泡 俗称裸奔 优点是成本低 缺点是一体式大灯容易san光，分体式的不易san光但有部分余辉，但不影响使用。建议h4 h13 9004 9007的灯泡安装后一定要观察，如san光就不要使用了。
2.原车带有近光单光透镜直接更换氙气灯 这种成本和上面的一样，但效果要好的多 推荐使用，远光建议不做改装，道理是氙气有启动时间 会车警示也就是闪灯，是不得劲的，这也是为什么宝马 奥迪 奔驰的车远光都是独立的卤素灯的缘故，除非你经常夜间行驶无路灯道路。
3.加装双光透镜，就是把原车的灯碗内加装一套双光透镜，加装后灯碗已经失去原有的反光作用，所有的灯光全部靠透镜来反射，变光也是靠透镜完成的，一体式大灯将不再出现san光现象，分体式的大灯远光保持原车卤素灯，将实现两近四远的灯光效果，如将分体式的大灯远光位也加装双光透镜，将实现四远四近的超霸效果，但成本也将大大提高，属于发烧级改装。
officially talk about the problem of lighting upgrades, there are several programs
1., the original car without lenses, direct replacement xenon bulb, commonly known as streaking, the advantages of low cost, disadvantage is an integral headlight, easy to astigmatism, split type, not easy to astigmatism, but there are some afterglow, but does not affect the use. it is recommended that the bulb of h4 h13 90049007 be installed after installation, such as astigmatism, do not use it.
2. of the original car with a single optical lens near light xenon lamp and the replacement cost as above, but recommended better use, it is recommended not to beam modification, it is a starting time of meeting xenon is warning lights, is awkward, which is why bmw audi benz che yuanguang are independent of halogen lamp the reason, unless you often travel at night without lights road.
3. double lens, is the original car lamp bowl in the installation of a double optical lens with rear light bowl has lost its reflective effect of the original, all the lights all rely on lens to change light reflection, is also on the lens is completed, will no longer appear the phenomenon of astigmatism one-piece headlamps, split type headlamps maintain high beam the original car halogen lamps, will achieve two nearly four distant lighting effects, such as the split beam headlamps also equipped with double optical lens, will achieve four four super near far effect, but the cost will be greatly improved, to have a fever class refit.

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