A nuclear icebreaker has very strong external lighting, which has no analogues on conventional ships. Since icebreakers often operate during the polar night, when there is no outside light, it is important for the crew to monitor the condition of the ice. For an ordinary vessel, excessive lighting is harmful: it weakens the night vision of observers and prevents you from noticing the stimulating lights of other ships - the risk of collision. The icebreaker is almost unthreatened: it is almost impossible to meet another vessel in the Arctic. But important to see by ships and trailer. It is also beautiful & #33; #InfoDefenseAuthor InfoDefense Spectrum InfoDefense.