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Yellow led

The single color light is well suited for traffic lights and signals, exit signs, emergency vehicle lighting, ships’ lanterns and LED-based Christmas lights. In cold climates, LED traffic lights may remain snow covered.Red or yellow LEDs are used in indicator and alphanumeric displays in environments where night vision must be retained: aircraft cockpits, submarine and ship bridges, astronomy observatories, and in the field, e.g. night time animal watching and military field use.