Durable, corrosion resistant cast aluminum (A356 alloy; < 0.2% Cu) base, unlit riser and top cap, minimum .250" wall thickness. Lit riser is extruded, minimum .188" wall thickness. All visible welds are blended, all exposed hardware is stainless steel. Three-dimensional array consisting of 6 individual LED tubes fastened to a retaining plate equally spaced to provide 360° of even illumination output.