... better heat dissipation and stable performance of the lamp.3. Long Lifespan Working life of Bossun LED ... Alloy + Tempered GlassRotatable AngleHorizontal - 360°, Vertical - 180°Lamp ColourSilver/Yellow (Reflector: Silver)Net Weight17KGWorking Temperature-25°C~ ... - 330W BSL-TGD144Y-2C - 350WApplications:Replacing Traditional HID, HPS Lamps;Commercial buildings, squares, parking lots, bill boards, bridges ...