Yeah. But that's not what the OG comment is suggesting. The use of Lidar here would rule out a light resembling a traffic signal by virtue of there being no laser reflection of that object: lidar would complement vision to rule out false positives.
They look different so it should be able to tell them apart if the model has been trained on these shapes. My robot vacuum uses lidar, the maps it makes of my apartment when it cleans are remarkably accurate where you can identify certain objects pretty clearly.