... for choosing. ----Component partThermal conductive corrosion proof aluminium radiator housing, aluminium reflector, installing case, clear glass cover, Epistar ... makes 70-80lm/W, with low lumens depreciation and good heat dissipation.2.Aluminium alloy die-cast baking varnish ... heat sink, clear tempered glass, ensures good heat dissipation. IP65, Corrosion proof, Dust proof, Water ...