I might have missed it...reading the last 2/3 years of this thread's posts, but am more than a little surprised no one has mentioned ZL's SC52w/L2w.
1 X AA/14500 lights are my favorite format, and when my several year old SC52w finally crapped out from being dropped too many times, I have missed it's versatility, size, output, and UI more than any light before! I got the SC53c to replace it and although it too is really great, I do miss the extra lumens on high when needed w/14500 power.
I have many other ZL's so no great sacrifice, but I sure wish ZL would go back to supporting a small/light-weight 1 X AA/14500 combo format again...the old SC52's in neutral were my favorite EDC lights by far.