1.Small Size 20W Ballast with Cable for Metal Halide Lamp 2.Brand: Holybay 3.Fn=50/ ... ballasts120°C(highest)0.46No1,there are strobe2,the power consumption 3,low voltage or temperature not first start, several start fragile cathode ... . 7, electromagnetic radiation is low, around electrical equipment does not affect the normal work. 20W Ballast with Cable for Metal Halide Lamp