Car headlights's heat resistance is achieved in the following ways:

1. Material selection: car headlights is usually made of high-temperature resistant materials, such as heat-resistant plastics and high-temperature resistant glass. These materials have high heat resistance, can maintain stability in high temperature environment, and are not easy to deform or crack.

2. Heat dissipation design: car headlights usually has a heat dissipation structure, which can effectively dissipate the heat generated inside the lamp through heat sinks and holes, so as to reduce the surface temperature of the lamp and improve the heat resistance. Good heat dissipation design can effectively prolong the service life of lamps.

3. Cooling system: Some high-end car headlights will also be equipped with cooling systems, such as fans and cooling pipes, to quickly dissipate heat, reduce the internal temperature of lamps and improve the heat resistance. The cooling system can effectively reduce the heat accumulation of lamps in high temperature environment and maintain the stable performance of lamps.

4. Heat-resistant treatment: In the production process, car headlights may carry out heat-resistant treatment, such as coating high-temperature resistant coatings and using high-temperature resistant glue. These heat-resistant treatments can improve the heat-resistant performance of lamps and ensure that they are not easily damaged in high temperature environment.

5. Heat resistance test: After the production is completed, car headlights usually carries out heat resistance test to ensure that it meets the heat resistance requirements. Testing methods include long-term working test in high temperature environment, thermal shock test, etc., to test the stability and heat resistance of lamps in high temperature environment.

To sum up, car headlights's heat resistance is achieved through material selection, heat dissipation design, cooling system, heat treatment and heat test. Only by strictly controlling every link in the production process and ensuring that the lamps have good heat resistance can car headlights work stably and reliably in high temperature environment and improve driving safety and comfort.