Does a Headlight Brightener Really Work?
2 Answers
The so-called headlight brightener is essentially adding two headlight relays to the original vehicle's headlight circuit. For vehicles with aging wiring and poor contact issues, installing one can have some effect. However, for vehicles with normal wiring, installing it may not be useful. Here is the relevant introduction: The headlight brightener uses the original vehicle's headlight switch group to control the coil winding of the brightener's relay, thereby opening and closing the relay's contacts. When the headlight switch is turned on, current flows through the relay's winding, and the magnetic field generated by the coil magnetizes the iron core, causing the contacts to close. The positive current from the battery flows from the fixed contact through the moving contact to the headlight bulb and then back to the battery's negative terminal via the return line.
Last year, I installed a headlight enhancer in my car, and the effect was quite noticeable. The brightness improved significantly, making nighttime driving much clearer, especially during rainy days when visibility was greatly enhanced. However, one issue was that right after installation, the light was too scattered and occasionally dazzled oncoming drivers, resulting in several honks. Later, I had to visit a repair shop to adjust the angle, and the technician mentioned that improper installation could also lead to excessive power consumption and shorten the bulb's lifespan. I recommend choosing a reliable brand before installation and checking local regulations to avoid exceeding standards and causing trouble. Overall, it's useful, but careful operation can reduce risks. When changing bulbs, pay attention to circuit safety to avoid blowing fuses or issues from aging wiring.