Do Low Beams Stay On When High Beams Are Activated?

[MacLilah]

Do low beams stay on when high beams are activated? Yes, they do. Here are the relevant explanations: 1. H4-type bulbs: Many mid-to-low-end vehicles use these. The headlights consist of only one set of bulbs (one on each side), with each bulb containing two filament groups. In low beam mode, only one filament group is lit, with a power output of 55KW*2. In high beam mode, both filament groups light up simultaneously, with a power output of 60*2. This bulb features a dual-power design. 2. Xenon headlight design: These have only one light source and no dual-power capability. Instead, they incorporate a shading mechanism. In low beam mode, the light remains on, but the shading plate blocks a portion of the light, causing the reflection angle to be lower and partially obstructing the light. In high beam mode, the bulb's operational state remains unchanged, but the shading plate opens, allowing full light output without obstruction, resulting in high beam illumination.