• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2009.06a
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• pp.538-539
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• 2009

The light of lighthouse as aids to navigation has been using filament with incandescent bulb so heat is being changed to light. More and More, LED leading lights, LED lantern, LED concrete main structure, LED bulb which have advantages of low power consumption and longer durability, what we call radiating diode, will lead the market in few years.