Obstruction lighting is used to identify objects during which times of day?

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Multiple Choice

Obstruction lighting is used to identify objects during which times of day?

Obstruction lighting is there to make tall structures easily seen by pilots, so they can identify the obstacle regardless of lighting conditions. That means these lights must be effective both when it’s dark and when it’s daylight, ensuring the object stands out whether the sun is up or down. In daylight, bright lighting or daytime-visible markers help the structure remain conspicuous against the bright sky, while at night the lights provide clear illumination against darkness. If a choice limited visibility to only night or only daylight, pilots could miss the obstacle during the other part of the day, increasing risk. Dawn or dusk could still present challenging lighting, so continuous visibility through day and night is the goal.

Obstruction lighting is there to make tall structures easily seen by pilots, so they can identify the obstacle regardless of lighting conditions. That means these lights must be effective both when it’s dark and when it’s daylight, ensuring the object stands out whether the sun is up or down. In daylight, bright lighting or daytime-visible markers help the structure remain conspicuous against the bright sky, while at night the lights provide clear illumination against darkness. If a choice limited visibility to only night or only daylight, pilots could miss the obstacle during the other part of the day, increasing risk. Dawn or dusk could still present challenging lighting, so continuous visibility through day and night is the goal.

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