At the end of 2023, Mr. Wang, a consumer in Hangzhou, reported that after three months of using a certain brand of newly installed LED downlight in his home, his family frequently experienced dry eyes and fatigue. Mr. Wang commissioned a third-party test, which revealed that the downlight had a flicker frequency of only 50Hz, far below the national requirement of “flicker frequency ≥ 120Hz” in the “Limited Values ​​and Energy Efficiency Grades for LED Lighting Products,” making it substandard. Mr. Wang contacted the brand’s after-sales service, but they claimed that “flickering in household lighting is normal” and refused to accept a refund or exchange. Mr. Wang subsequently complained to the 12315 platform. After mediation by regulatory authorities, the brand ultimately replaced the downlight with a compliant one and compensated him for the testing costs of 800 yuan.