... light can be installed on ships,boats,barges,watercraft,dredger,work boat,vessel,river boat,towage,warship SPECIFICATION 1).Nominal night visibility ... 1.1W APPLICATION 1) SHIPS,BOATS,BARGES,YACHT,TOWAGE,WARSHIP,DREDGER,INLAND BOAT2)OIL AND GAS OFFSHORE PLATFORM MARKING 3)PORT ...