I just switched to to nockturnals from lumenocks but that was only because the lumenocks didn't fit my new Easton Injexion arrows. I'll put the lumenocks on my sons arrows. The lumenocks turn on and off easier but as 00buck said they can come on by just bumping them. I use a broadhead to shut off the nocturnals. Personally I don't think it makes much of a difference.