... 1.Small Size 20W Ballast with Cable for Metal Halide Lamp 2.Brand: Holybay 3.Fn=50/60Hz Specification & SizeName HID Electronic Ballast for ... 150W to modify for you.20W,35W,70W,150W,250W for Metal Halide lamps with CE, ROHS,ISO9001 ... lamp automatically cut off the power 5, with overvoltage protection, to prevent a short time voltage ... the normal work. 20W Ballast with Cable for Metal Halide Lamp