... life span is average about 20000Hrs.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, no negative ... used in T5,T8,T12,H Tube.6.The electronic ballasts have CCC,CE,RoHsPower 1×40W Power factor 0.95 Electronic ballast For circle tube