... 1M diameter, EVERFINE famous brand,It is used to test lamp's lumen, consumption. Power factor, input current and Ra index ... .Hi-pot tester, It is used to test lamp's Hi-pot from 1000V-4000V. EMC tester, EMI tester ... raw material. 2). Second, during production period, before lamp's final assembling, each lamp we make aging testing 5hours,5hours again after ...