I thought about making my own as I am a DIY kind of guy. After pricing parts, two nocks and a bobber light for each one, then buying glue I came up with about 17.50 to make 3 lighted nocks. If I buy more bobber lights than needed in case I mess one or two up, I have spent as much as buying lighted nocks. To me, it wound up not really being worth the effort.
We live in the land of the free because it is the home of the brave. THANKS to all our military and LEO for the job you do.