body: 0.3/0.5mm (or as per requirement) high quality cold-rolled steel sheet. Lamp holder: PC material by UV resistance processing Dimension: 595*595*75 mm Optional reflector: matte aluminium,mirror aluminium, or laminated steel stype: Grid can be "v" or "I"shape. ballast: magnetic ballast or electronal ballast Wire: 0.5mm2 high temperature anti burning