electronic ballast 1.Low power consumption 2.Provides long service life and ... : 7W,9 W,13 W,18/20W, 26W, 30W,36 /40W, 58/65W;7) Color: white / black;8) Material: steel cover ... ) Provides long service life and super quiet ;12) 400w HID electronic ballast, 13)compatible with MH and HPS bulb 14)better heating ... to power factory correction (pfc) 20)THD less than 12% electronic ballast