Which lights are used to delineate taxiway edges?

The use of blue lights to delineate taxiway edges is standard in aviation. These blue lights are specifically designed to provide visual guidance to pilots and ground vehicle operators, clearly marking the boundaries of taxiways. This helps in ensuring safe navigation during both day and night operations, improving overall situational awareness on the airside of the airport.

In contrast, other colors serve different roles: green lights typically indicate the centerline of runways, white lights are used for runway edge lighting, and red lights usually signify dangers or the edges of pavement, particularly in terms of alerting to hazards. Therefore, blue lights are uniquely positioned in their function, making them essential for identifying taxiway edges.