... to maintain Basic specifications:1.Light source:70W-400W HPS/MH.2.Shell material:Die-casting Aluminium body.3.Glass cover: Tempered ... and so on.Structural characteristicsLamp housing:Alloy die-casting, thickness of 5mm, smooth,elegant in shape,light and sturdy in configurationReflector:Electrolytic ... glass, thickness of 4-5mm, transparency, and high strength luminarie street light