It might help you to think where you have seen those 6 lights before.
but I still dont get it.
was literally the first thing I have seen.
no idea what exactly triggers them.
6 in a line cant be true due to not enough space :-)
Have you found the other room that has the 6 lights? There's something you can interact with in there. It might be easier to figure out what happens as a result with the sound on.