last year i made my own...it was either on or off, but while hunting i just turned it on and left it on...no biggie..wasnt much brighter than my fletchings while it was nocked. it didnt affect flight at all.

this year, im shooting tracer nocks. i cannot get my broadheads to group with my fieldpoints. they hit about 3-4 inches lower than my fieldpoints. drives me mad lol...but, arrows seem to be flying true so i cant complain i guess...i really like them for watching arrow flight and shot placement. my woods are usually pretty dark till the leaves fall off the trees...i can still see my arrows without them but sometimes its really tough. i like them just for that reason...in the dark woods they really glow