UVC-LED technology is being highlighted as a key technology to replace conventional mercury lamps in the fields of water, air, and surface sterilization. Its importance became even more pronounced during the COVID-19 pandemic. However, when applying UVC-LEDs to real-world applications in the engineering field, we have consistently faced a critical technical hurdle. That hurdle is ‘Reliability.’ The primary applications for UVC-LEDs—such as water purifiers, HVAC (Heating, Ventilation, and Air Conditioning) systems, and home appliances&mdas…