APFC Circuit Design, Constant light output over fluctuation of voltage supply.Reliable Protection of EmergencyAuto-Reset after Lamp ReplacementEMC (Electro-Magnetic Compatibility)Low THD, High Power FactorVoltage Range: AC187-253V 50/60HzComply with IEC60929, IEC61347-1, IEC61347-2-3, IEC61000-3-2, EN55015, EN61547CE, CCC ApprovalApplication: Office, Meeting Room and special for place which requests constant light output. Item CDZ328