Didn't see this one personally - I'm up in Cumbria so a bit far from Lake Michigan! But I'm curious, did the lights move in any kind of formation or were they just static? The reason I ask is I had something similar over the Lake District about two years back, three orange lights in a rough triangle shape that just hung there for maybe four or five minutes before going out one by one.
Also wondering if anyone ran a spirit box session nearby around the same time? I know that sounds like mixing two different things but I've started to think there might be a connection between UAP sightings and spikes in EVP activity. Could be nothing but I've noticed it a couple of times now.
Was it just you who saw it or did other people in the area report it too? Would love to see photos if you managed to grab any.