What type of light is used to mark obstructions along the runway?

The use of red lights to mark obstructions along the runway is standard practice in aviation safety. Red is universally recognized as a warning color, signaling to pilots that there is a potential hazard nearby. These red lights are typically illuminated at night or in low visibility conditions to ensure that obstructions, such as masts, towers, or buildings, are clearly marked and can be easily seen by pilots during approach and takeoff.

This is crucial for maintaining safety in aviation operations, as it helps prevent accidents and ensures that pilots can navigate the area without encountering unexpected obstacles. The color red in aviation is more than just a color; it conveys urgency and caution, which is vital for effective communication in an environment where visibility can often be compromised.