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    What are some of the uses of LED coloured lights in the defence industry?

    Green LEDs of wavelength 495nm along with red LEDs are useful for military pilots who have special devices that are made for night vision. Blue LEDs are useful for pilots who need to read maps at night. Special infra-red LEDs are used to light areas at night without the target being aware of being viewed. This is facilitated through special night vision IR equipment.