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In this study, the power consumption and illuminance were analyzed by replacing the fluorescent and incandescent lamps used as light sources for the engine room lighting of the training ship with LED light sources. By replacing 40W and 20W fluorescent lamps with 17W and 11W LED lamps, 40W fluorescent lamps reduced power consumption by 57.5% and 20W fluorescent lamps reduced power consumption by 45% and improved illumination by 56.8%. In particular, as a result of replacing 60W incandescent lamps with LEDs, power consumption was reduced by 85%. By installing an auxiliary cooling seawater pump that supplies cooling seawater to the engine control room air conditioner and boiler drain cooler in parallel, there is an energy saving effect of 88.1%. was confirmed.