... around Funtion: testing Life time. Power,Power factor,Current, Voltage,and Annual power consumption(calculated by 10hrs/day);Weight: 6 ... : 50cmDiameter of opening hole: 10cm Maximum testing wattage: 300W. Input voltage: 100-250V AC. Testing lamps: energy saving lamps , tubes , ... saving and environmental lighting products all the time. lumen tester(LT-SM901)Power , Pf, Voltage ,Current,Apc,cct,lumen