Awhile back somebody had a thread about the different fiber optic colors and what was easiest to see. We agreed that the blue/violet fiber just didn't cut it. I was getting my spot bow ready this morning for this winter and I tried something on my Sniper 500 sight. I used clear fiber optic with a blue, not purple, Extreme light and it was the clearest .019" pin I have ever seen. I have a slight astigmatism and I usually get a halo around fiber optics. With the clear fiber and blue light there was no halo and the pin was super clear and great for contrast against a 3 spot target.