... .3.High power factor,Low THD ,the electronic ballast can work steadily when the voltage range ... varies from 160V-250V.4.The electronic ballast works in high frequency beyond 20KHZ,quietly ... T12 Tube.6.The electronic ballasts have CCC,CE,RoHs,EMC2×40W Electronic ballast with PF0.98,THD<20 ... %,CCF<1.7,quick/preheat start (option),with CE approval ...