I don't use any lighted nocks anymore. I used Lumenoks with about a 50% success rate. I even made my own with about the same rate of success. Earlier this year, a doe ran off with my arrow. The arrow was an Easton Axis ($16) tipped with a Rage 2 ($14) nocked with a Lumenok ($11). I put my foot down after that arrow was never found, especially since the Lumenok didn't light up.