What is the purpose of an "approach light system"?

The purpose of an approach light system is to assist pilots during the landing approach by providing visual guidance as they descend toward the runway. These lights are strategically positioned to create a visual path that helps pilots align with the runway, especially in low visibility conditions. The approach lights are typically composed of a series of lights extending from the approach end of the runway and serve to enhance situational awareness. This guidance enables pilots to better judge their altitude and alignment as they near the runway threshold, contributing significantly to safe landings.