... SizeNameHID Electonic Ballast for Metal halide lamp 250WModelGN250230VACGC(250W)Size195*108*63mmweight/pc1500gPcs/Ctn10pcsNet weight/ Ctn15kgGross weight ... abnormal, moisture, lightning,Anti electromagnetic interference function.1, high quality, high reliability, long life. 2, its own power ... does not affect the normal work. Hot Selling 250W MH/HPS Electronic Ballast from Shenzhen, Manufacture ...