i bought 2 lighted nocks and the only reason why i did is for filming my hunts so you can see the shot placement on the deer a lot easier. if your thinking about bying them just to help u not lose an arrow i dont think its worth it but they do work very good if your filming. I shoot firenocks and they work very good. Also the nockturnals work good to. I would stay away from the easton tracer nocks.