I know that the 4Sevens P01, Fenix E01, and the Letherman S2 can all use a Chap Stick cap as a diffuser, but I'm wondering what other single AAA lights can do the same. The Inova XS head is a bit too big to work. So I have come here to draw on the experience and wisdom of the members of this forum to find this tidbit of information, because I can't afford to buy an example of every single AAA light out in the market.