I picked up one of those mini-mag kits with the lanyard, pocket clip and filters just to use the pocket clip. I think the kits are like $4.00 each. I just discovered that the filters also work with a little modding! Just cut about a 1/4 inch off the rubber filter holder with a razor blade and it will slide right on the head of the Dorcy 123. My kit came with a blue, red and clear filters. Looks kind of stupid but works perfect! I'm sure it might fit other lights also!