It's no different then shooting different offerings of bullets from the same manufacturer. If you plan on hunting with the luminocks then you should site your cross bow with the luminox, and practice with then as well. I practice with the same bolt and broad head that I hunt with that way there is no surprises or justifying required. the money you pay for 3 practice bolts and heads will pay off in the end if you practice lots, they should last you a hell of a long time as long as you don't do a robin hood on them.