Why does the Accord use halogen for high beams?
1 Answers
The reasons why the Accord uses halogen bulbs for high beams are as follows: 1. Halogen bulbs have strong penetration, longer range than LED or other types of lights, and low color temperature, making them highly suitable for high beams. 2. High safety: LED lights are too bright, with strong advantages for low beams and high color temperature. If used for high beams, they can affect the visibility of other drivers, creating adverse effects and potentially causing accidents in severe cases. Halogen bulbs have a weaker color temperature and do not affect oncoming drivers. Below is an extended explanation of how halogen bulbs work: 1. When the filament heats up, tungsten atoms evaporate and move toward the glass tube wall. As they approach the tube wall, the tungsten vapor cools to around 800°C and combines with halogen atoms to form tungsten halide. 2. The tungsten halide continues to move toward the center of the glass tube and returns to the oxidized filament. Since tungsten halide is an unstable compound, it decomposes back into halogen vapor and tungsten upon reheating, allowing the tungsten to redeposit on the filament and compensate for the evaporated portion. 3. Through this regenerative cycle, the lifespan of the filament is significantly extended (almost four times that of incandescent bulbs). Additionally, since the filament can operate at higher temperatures, it achieves higher brightness, higher color temperature, and higher luminous efficiency.
