What is a Double Hernia?

The bi-xenon headlight, the industry term BI-XENON, is exactly described as: In the same reflection system, only one xenon bulb is used, and the mechanical shutter switch is used to meet the two lighting functions of low beam and high beam. In particular, the range of low-beam illumination remains unchanged during high-beam illumination. In other words: Bi-xenon headlights use two sets of single-light source lighting effects with a set of illumination light sources and mechanical shutter mechanism.