Archery Question for you all

by uncowboy, Thursday, February 16, 2012, 18:03 (4612 days ago)

After not hunting archery for a few years since I was injured I went out this year and performed poorly. I bought a new bow and I am switching to Carbon arrows.My Question is about the KNOCKS .I am looking at the new knocks that light up when fired. I lost a lot of Eyesight the lasy 10 years and This would be NEEDED for me. I was wondering if anyone can tell me the efects on shot placement and arrow flight?
Should I buy these knocks?? I won,t see the arrow in flight without them. J.Michael