Which equipment is NOT typically associated with airside clearance and obstruction lights?

The equipment not typically associated with airside clearance and obstruction lights is the runway guard lights. These lights are primarily used to alert vehicle operators to the presence of a runway and provide a visual indication to enhance safety when transitioning from taxiways to active runways. They are critical for maintaining situational awareness but do not serve the purpose of marking obstructions.

In contrast, the ILS localizer building and the ILS glideslope antenna are integral components of the Instrument Landing System (ILS), which guides aircraft when landing; therefore, they are often part of the airside environments requiring appropriate marking for clearance. Golf taxiway overpasses are structures that may necessitate specific lighting for safety, especially in areas where clearance is essential for both aircraft and ground vehicles.

Thus, runway guard lights focus on operational safety at runway intersections rather than marking obstructions, making them stand apart from the other options that are closely tied to airside clearance and obstruction lighting requirements.