Answer :
Final answer:
REILs are high-intensity flashing lights located at runway thresholds that assist pilots in identifying the runway ends, especially during night-time or low visibility conditions. Lights' color aids in distinguishing them.
Explanation:
What are Runway End Identifier Lights (REIL)?
Runway End Identifier Lights (REIL) are high-intensity flashing lights located at each end of the runway threshold to help identify the runway ends. REILs are especially beneficial in enhancing the visibility of the runway during times of reduced visibility or in distinguishing between runway ends and other lighted areas, such as taxiways. These lights are typically installed at airports to aid in night or low visibility landings, and their flashes help to signal the beginning of the runway to the pilot.
Lights' Color is often a key feature for identification; for instance, REILs and other airport lights may come in different colors such as white, green, or red.
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