What are the domestic and international EMC (electromagnetic compatibility) standards for ultraviolet therapy devices?

Ultraviolet (UV) therapy devices (used for skin disease treatment) must comply with GB 9706.1, YY 0505 (domestic), and IEC 60601-1-2 (international) EMC standards. The core components are the UV lamp (e.g., a low-pressure mercury lamp) and its ballast (electronic or inductive). Electronic ballasts operate at high frequencies (tens of kHz) and are the primary source of interference. Standards require that conducted and radiated emissions meet the limits, and the device's light dose timing and control functions must have sufficient immunity to external interference such as static electricity and fast pulse groups to ensure accurate treatment dosage.