1.Class I structure Input Voltage:100-277V~50/60Hz 2.Efficiency 93.5% (Typ.) 3.Constant power drive, Constant current output control mode 4.Metal shell Contruction, protection grade:IP67 5.Lighting protection level: difference module 6kV,common mode 15kV 6.Function selecton: Output current is adjusted by external potentiometer(A version only) Isolated 3 in 1 dimming (P version only) 7.Lifetime design: 5 years