I use the pink lumenok on my Easton flat line surgical carbon arrows. Upon installation, at first the fit was a little tight, but after a few adjustments they worked great. Two weeks ago I harvested my third black bear in Manitoba. This is the first hunt that I used a Lumenok and I loved it! I liked that the flight of my arrow was so easy to see since the light was so bright, and upon reviewing camera footage I knew exactly where the arrow hit. It gave me immediate comfort on shot placement. I would recommend Lumenok to any bow hunter!