My turn? I really like my Fenix LD02 and was very happy when it came back from repair. I think my top requirements are:
- Reliable! Turns on when needed, and *stays off* when not needed
- Button switch - preferably a tail button.
- 100-ish lumen high mode so I can check out the back yard or see the garage door from the house -not looking for hundreds of metres of throw, 10 metres is about as far as I can see any more
- Mid-range mode - I don't always need 100+ lumens, 5 lumens or less is OK for many things but for many of my purposes something in the 20-ish area is pretty necessary.
- There should be a hole in the tail that I can run some cord through to secure it to a key chain or other device. I've grown to distrust all the clever metal claws, split rings, or chains that these lights come with - nothing out-lasts a few inches of Atwood mini-cord with a good knot in it.
- Don't much care about CCT and CRI - if I'm matching paint chips, I'm going to do it under northern daylight, not with a flashlight.
- Round-ish beam shape, not too throwy, no weird shadows or big holes in the beam. (At least as good as a Maglight AAA, which I carried for years and which never failed to find my rental car at the airport; after 2001 I kept in in my office briefcase in case I had to find my way down a stairwell !)
The LD02 has a clip which I've rarely used - there if I need it, I guess, though on the LD02 it can't be reversed securely to put on a hat brim.
The LD02 can't tail stand - I can see times that would be useful, though the mission of a pocket EDC light rarely involves bouncing light off the ceiling to light a whole room.
They don't make the original LD02 any more, the current model is much longer, heavier, and includes a UV LED that I would be baffled to find uses for. I have UV-only flashlights, they stay in a drawer, not in my pocket. At least they also made it dimmer to compensate for its other defects.
The LD02 runs fine on cheap and cheerful Ikea NiMh AAAs, and also on Eneloop AAAs. I save a few AAA Everyready lithium primaries for standby purposes. I generally change the battery in the LD02 because it's battery-maintenance-day, not because it's run down.
I had a Titanium Innovations CA1 in aluminum, but the darn thing quit working after a year or two; it also had a nasty habit of either turning on in my pocket or unscrewing itself into two parts - at least I never lost the head after one of these incidents. At least I could one-hand operate the twisty head, which I suppose is compensation for self-disassembly. Guess it would cost too much in a $20 light to put in some kind of detent spring to ensure a lot more torque is needed to remove the head than just pocket friction.
I look forward to all the suggestions in this thread...my LD02 can't last forever, and I'd like to give reliable AAA keychain lights as gifts. Everyone should have one!
Bill