... certificate Multivolte electronic ballast1.The power waste is low,saving 80% energy.2.Adopt high quality semiconductor electronic component,make ... average about 20000Hrs.3.High power factor,Low THD ,the electronic ballast can work steadily when the voltage range ... Electronic ballast with PF0.98,THD<20%,CCF<1.7,quick/preheat start (option),with CE approval,3years warranty.... Electronic ballast 4X40W/0. ...