I agree with everything Ghostwheel has posted about realism here. Ultimately we just decide something and move on; it's way too easy to get wrapped around the axle about stuff like this. That would be a fifteen minute digression at a live game, while on a forum game it can derail things for a week or more. Better to be efficient than to be correct in situations like this.<br/><br/>(That having been said, I'd be extremely surprised if the US Army hadn't done extensive studies about exactly how far away you can see things under various lighting conditions, in order to shoot them in the head.)<br/><br/>About the spell, I think Blinkin' is asking about the Light spell that Zanthus offered to cast on the arrow. And I think the answer is: Whatever makes sense to you, Blinkin'. Just write it and move on. That's pretty much always going to be the answer to questions like this, in my opinion. If something happens that somebody really takes issue with then we can unwind and rewrite, but in my experience that's hardly ever necessary.<br/>