Flashers, and Dodgers came to us from the west coast. They believe the flasher sends out a vibration to Salmon’s lateral line that feels like the signature of the tail of feeding fish. They can feel that further away then they can see the flash of the flasher. The flasher’s flash entices them closer and that’s when they spot whatever is being trailed as the bait. Out there primarily it is cut bait. Lake Michigan primarily reverse tied flies. I don’t know anyone that thinks it makes a school of anything. The old Luhr Jensen six pack tried to do that. Grey Beard