... energy saving lamp ballast:·(EMC),strong anti-jamming ,suitable for a group of assembled used.·High technic,high quality fittings,perfect ... design circuit,Low wastage,steady quality·PF :0.99,total harmonic waves less then 10%·100V-264V ... years,3 year's life time of tube(10 hours a day)·Cold start under 30 degrees below zero centigradeT&P ...