Every time light arrows come up, we get the same 25 vs 40 ft-lb argument and it goes nowhere, because nobody's numbers are attached to anything that actually happened. So let's attach them. If you've taken a whitetail with a setup someone would call marginal, post it: - Bow weight at your draw - Total arrow weight and head - Distance and angle - Penetration — and be honest about it I'm as interested in the ones that went badly as the ones that went well. A pass-through at 15 yards on a broadside doe doesn't tell us much; a one-lung on a quartering-to shot at 22 tells us a lot. If your light setup failed you, that's the most useful post in this thread.