Uses high quality aluminums for material of crust, The outer covering uses the high quality aluminium mould material. The ends cover is with ABS's plastics, T5's light source, and the electronics ballast.The cover reflecting was designed by the technology of Gao Ci's parabola pitch arc,with the advantage of liquidity in stria, and joining in marriage light reasonably with light dispatched, the wideer in reflecting surface, all of them is more propitious to lights reflected.light reflected cover is the advantage of small in size, light in material, high intensity and the superficial processed by the way of anode oxidation, and possessing the characteristic of high diffuse reflection efficiency, reasonable in physical design, convenient to install, and also are the special necessary lamps of T5.