... 50/60Hz 3, 2200-2500LM 4, CE & RoHS certificates high power led downlight 30w 20w VoltageAC85-220VPower frequency50-60HZTHD<9 ... No glare, no light pollution ,high directive and uniform brightnessHigh power led 30W Intigrated circuit led.Constant-current source, instant start ... electrical efficiency can achieve to 88% ,the max power factor is 98%,the power supply has passed CE,EMC,FCC,ETC, certifications ...