Specifications: 1)Power Voltage: 220V 2)Power Frequency: 50-60Hz 3)Power Factor: ≥0.98 4)Coeffcient: ≥0.95 5)THD: ≤10% 6)CF: ≤1.7 7)Life Expectancy(hrs): 20000hrs 8)EXT.Dimension(Lx Wx H): 320x 34x 28mm; 365x 40x 30mm 9) For Lamp Type: 2 x 14W, 2 x 21W, 2 x 28W, 2 x 35W, 3 x 14W, 3 x 21W, 3x 28W, 3 x 35W 10) Metal housing Features: 1) energy saving 2 )low voltage igniting 3) high power factor 4) Low harmonic 5) long life 6) flicker free and no noise 7) easy to install and use We can manufacture different sizes and specifications of electronic ballasts according to customers' request.We also can provide OEM service