... ,meeting room,waiting hall,department store,supermarket,shool,and showroom ENERGY-SAVING GRID LAMPS,Installation:Ressed and ceilinng mounting with chain and ... :high-quality steel or aluminium,surface is coated with white power.oil removed and rust removed .Reflector:excellent mirro aluminium or ... :electronic ballast or magnetic ballastWire:copper wires or aluminium wires ENERGY-SAVING GRID LAMPS