For a municipal streetlight project in a coastal city in Fujian, the original power supply often failed due to moisture and vibration, requiring frequent maintenance. We introduced a power supply using a semi-potting process for PCBs. This is moisture-resistant and shock-resistant, with a 50% longer lifespan and excellent adaptability to harsh outdoor environments. In the three years since its launch, the failure rate has been extremely low, earning customers high recognition for the consistency and reliability of our products.