... size,easy to carry around Funtion: testing Life time. Power,Power factor,Current, Voltage,and Annual power consumption(calculated by 10hrs ... ;150cm;200cmDiameter of opening hole: 10cm Maximum testing wattage: 300W. Input voltage: 100-250V AC. Testing lamps: energy saving lamps , tubes , ... the good and poor quality of lights . The testing system is combined the software and hardware technology to ...