... to carry around Funtion: testing Life time. Power,Power factor,Current, Voltage,and Annual power consumption(calculated by 10hrs/day);Weight: 6. ... poor quality of lights . The testing system is combined the software and hardware technology to keep the equipment precise and stable ... lights , such as the lux , CCT, lumen, luminous efficiency , power , power factor , CRI ect . Your trust is our key! Let's ...