electronic ballast for T12 fluorescent lamp Power: 40W Power factor:0.98/0.92 110V/220V electronic ballast , fluorescent lamp ballast ,ballasts ModelT12/40WMatch lampT12 40W fluorescent lamp, x1; x2 Power Factor 0.98/0.92 Input voltage 110V/220VUnit sizex1 : 220×39×33 mmx2 : 360×39×33 mm Carton sizex1 : 405×305×175 mm x2 : 405×235×175 mmPCS/CTN x1 : 100 pcs/CTN x2 : 50 pcs/CTN T12-40W