I use .019, My pins are real tight do to the speed of my bow and I want as much clearence inbetween the pins that I can get..thinking of going to .010 for more target picture

.19 all the way, I feel as though I am making a more precise shot alignment like floating a pin on a target instead of a softball. I have used both in really low light and the .19 with a wrap or extension are almost as bright as my buddies .29.

029 extreme 4pin
More of a security blanket for me. Like to know I can make that shot at the very last minute of shooting light.