Hey everyone! I recently came across an above ground skimmer and had a question about it. In the picture, there’s something that looks like a light or sensor at the bottom front of the skimmer. Also, in the top left corner of the skimmer, there’s a circular component that has an electrical cord connected to it from the outside.

Does anyone know what this setup is for? Is it some kind of integrated light, heater, or sensor? Just trying to figure out what I’m looking at before I dig in further. Thanks in advance!