Li bit, ive used lumenocks an nocturnals and both seemed to change point of impact a little but out to 45 yrds it wasnt enough to really matter. Lumenocks are junk tho ill never use them again. I shoot the red nocturnals an they look like ur shootin a deer with a laser beam..hehe there pretty neat. Have been havin problems with them not comin on when shot or not turnin off when i pop the button back out. Ive also had a few that just died after about 2 shots. They ort not do that for the money they cost