Finally used my gift certificate and received my TFO tritium powered site pin from Cabelas.
Seems well built, fiber optic is green,things were looking good. The ultimate test? I turned off all the lights in my windowless office and shut the door, total darkness. Big disappointment followed. I had expected the fiber to glow prominently. What it did was glow just enough so that if I strained my eyes I could see it. I don't think you'd see it if looking through a string peep. I was sure I had a defective one, so I called Truglo. They said no, that's all it does. At $25 I expected much more. I'll probably keep it, to test it in real world conditions as I wanted a new sight pin anyway, but who knows. If you're interested in this pin, beware what your expectations are...