Multiple uses. I love that little thing!
Works great for the candle use and I imagine would be a great little light hung from the lanyard in a tent or other such space. I use it to light up the work space on a podium I stand at while working valet. (I use similar diffusers on Magled 3d's to light up dark areas and walkways at private functions by sticking the mag in the top of a white traffic cone to elevate it and stand it up straight.)
I also cover one side with cardboard and use it as a booklight. I think I might actually get another and use black paint for the same effect. Makes a great booklight on low or med depending on ambient light, only prob is that the glare from it can bug my eyes, hence the cardboard shield which I would like to try using black paint for.
I also, boringly enough, use it to direct traffic, although here my olight t10 is better for its ability to go from a low light setting straight to strobe. Same size so it works great. Can't leave the p2d on turbo all the time, it gets hot. I love the fact that it works just about as well as the diffusers on mags but I can easily drop it in my pocket when not in use.
All that and I've only had it for a week.
-Pete