... light a large area. 2.it's easy to control and modify 3.light pole is very strong Technical parameter 1 ... made of high-quality steel, hot-dip galvanized5.Mode of switch: hand control,time control and microcomputer control.6.light source: 6 ... ,railway stations,docks,freight yard,highways,stadiums,flyovers,etc. 2013 hot sell the 30m high mast light with Q235