As western and archer have already said, I would go with the tracer nocks over the lumenok. Much more reliable and even though they do add a little more weight, its not enough to hurt arrow flight at all. I have used both lumenoks and tracer nocks and have had the lumenoks fail on more than just a couple occasions, and if I'm gonna spend the money on a $10+ nock then I want it to work when its supposed to, and thats what tracer nocks do. They work.