... installed on ships,boats,barges,watercraft,dredger,work boat,vessel,river boat,towage,warship SPECIFICATION 1).Nominal night visibility:2km-5 ... Turn on at dust and turn off at dawn automatically. 3)Completely self containt,no cables,no people management. 4) ... WARSHIP,DREDGER,INLAND BOAT2)OIL AND GAS OFFSHORE PLATFORM MARKING 3)PORT LIGHTING 4)MARINA LIGHTING 5) DOCK LIGHTINGOur AdvantageLED ...