When sourcing BYD head lamps, you must verify the Light Source Type (LED, Xenon, or Halogen) to ensure compatibility with specific series like the Tang, Han, or Atto 3. Pay close attention to the Voltage (typically 12V) and Power Rating to prevent electrical system overloads. For high-end models, confirm if the lamps support Adaptive Front-lighting Systems (AFS) or Matrix LED technology, which require specific control modules. Ensure the Luminous Flux (Lumens) meets original equipment manufacturer (OEM) standards for optimal visibility and safety.