Yeah, I bought it with the idea of using it on the incan bezel, but decided to keep that bezel as is. The KL1 bezel didn't have any bad spots in the beam, but when I put the diffuser on it to see if it would fit, it made the beam even more "smooth" without any perceptible loss of brightness that I could tell. So, I just left it on the KL1, figured it was a little more protection for the lens.