What are Runway Edge Lights characterized by?

Runway Edge Lights are indeed characterized as being white and operate primarily during periods of darkness or under conditions of restricted visibility. Their main function is to delineate the edges of the runway, helping pilots in visually identifying the runway boundaries, particularly when natural light is insufficient. These lights provide crucial visual guidance to aid in safe landings and take-offs.

When it comes to lighting conditions, Runway Edge Lights are activated in low visibility situations or at night, ensuring that pilots can effectively navigate the runway. This function is vital for ensuring operational safety during critical flight phases. Other light colors and functionalities mentioned in the options do not apply to Runway Edge Lights. This specificity is fundamental for pilots and ground personnel operating within airside environments to avoid any confusion regarding runway navigation aids.