As much as we drill instrument students on any of the 10 items from FAR 91.175 (c) you must see to go below DA/MDA, in the real world if we see anything that might be part of the runway, we land on it. Its nearly certain that youll first see the approach lighting system (ALS), allowing you to descend to 100 feet AGL and search for something resembling a runway.
This is a companion discussion topic for the original entry at https://www.avweb.com/flight-safety/technique/approach-light-secrets