I have used my own type of lighted nocks that I made myself. They cost about $2.00 to make instead of the $10 that I have seen some going for.

As far as spooking game goes....no way.
Take a look at these 2 clips.

http://www.texasbowhunter.com/video/...127hogshot.wmv

http://www.texasbowhunter.com/video/...achalajave.wmv

I can show you countless other videos of deer and hogs shot with these nocks and they definitely don't spook game.