Electronic ballast It can work in the range of 77V-277V,high ... is low,saving 80% energy.2.Adopt high quality semiconductor electronic component,make highly use of the energy,long life span ... factor,Low THD ,the electronic ballast can work steadily when the voltage range varies from 77V-277V.4.The electronic ballast works in high frequency ... 0.99 THD less than 10% 77V-277V multi voltage electronic ballast