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(LxWxH): 320x35x28mm 9) For Lamp Type: 1 x 22W, 1x 32W, 1 x 40W, 1 x 55W 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