... strong Technical parameter 1.Light source:400W-1000W High pressure sodium lamp or high pressure metal halogen lamp.2.Lighting protection level ... level:IP444.The frame of lamp board is made of high-quality steel, hot-dip galvanized5.Mode of switch: hand control,time control ... ,railway stations,docks,freight yard,highways,stadiums,flyovers,etc. 2013 hot sell the 30m high mast light with Q235