I, too, have a Photon Micro Light that to my surprise still works after at least 15? years? When did they come out? I would never have guessed it would live so long - but that's the advantage of lithium batteries.
Currently not working, but I have a replacement LED waiting on the bench, is a LED LENSER 7??? - using three AAA cells, 80 lumens claimed - I wrecked this LED demonstrating that there was *no* current limiting resistor in this light. I bought this probably about 2008 and it was a new favorite.
I have a 23-year-old Maglite mini but it started off incandescent and only acquired an LED about ...10?...years ago.