I used the luminocks for the first time this year. I lost two arrows after hitting branches. They lit until they hit the branches and then the jar turned off the lights and I ended up losing both arrows. At about $10 per arrow and another $10 per luminock they were expensive shots. I learned two things from these experiences. 1) Double check very carefully before the shot to make sure that there are no branches in the way. 2) Look for less expensive lighted nocks.