What does a dot on the runway lighting symbol indicate on an approach plate?

A dot on the runway lighting symbol on an approach plate signifies that sequenced flashing lights are installed. These lights are used to provide visual guidance to pilots during approach, offering both a cue for alignment with the runway and a means of highlighting the intended landing area. This visual indication helps improve situational awareness, particularly during low-visibility conditions or at night, enabling pilots to make more informed decisions about their landing approaches.

The other choices do not pertain to the meaning of the dot symbol. The runway clear zone refers to an area necessary for aircraft safety but does not correspond to runway lighting indications. Warning lights being operational or runway elevation might be relevant information but do not relate directly to the specific meaning of the dot symbol on the approach plate.