Approach lights are a series of lights located near the runway that help pilots during the landing phase of flight. They provide visual guidance to indicate the correct approach path and assist in aligning the aircraft with the runway. These lights typically illuminate in a specific pattern, signaling to pilots whether they are on the correct glide slope. The configuration of approach lights can vary, but they often include a combination of steady and flashing lights. Instrument Landing Systems (ILS) may also work in conjunction with approach lights to enhance precision during low visibility conditions, ensuring safer landings.