- Modes: At least two - high/low. I really prefer it not to have any strobe/SOS or the like. I really prefer the "low" mode not to be PWM but real voltage/current regulation. Should have good memory implementation. If there are three or more brightness levels - I prefer them to be low->medium->high.
- Brightness: I'm not sure what "high" lumens I need, but I want it in the vicinity of the C30 or higher. The "low" can be like the MXDL, which is fairly low (under 10 lumens, I guess).
- Runtime: At least 1 hour in "high" mode, at least 6 hours in "low" mode.
- It must be able to tailstand. I want to use it as a candle / emergency light. I found that the MXDL light is enough light for me for this purpose.
- Size: Should not be big. I would like it to be pocketable.
- No sharp / pointy parts - it should go into my pocket and I don't want it to rip anything.
- LED: White - I don't care if it's cold, neutral or warm, only that it won't have too much of a non white tint. (not purplish/bluish tint as the MXDL, not too orange if warm, not green etc.). Also, I really prefer it to be branded - Cree, SSC, OSRAM, etc. as long as it's not generic.
- Batteries: I really have no preference here, although I'm unfamiliar with the Lithium-Ion types (have only used AA/AAA so far). (aren't lithium-ion batteries dangerous?)
- Switch: I prefer a clicky, but I guess I can live with a twisty as long as it's not too easy to separate the flashlight body by accident as it is with the MXDL.
- Body: Should be rigid (the C30 got some marks from a 30cm fall - not good enough) and water resistant (I want to be able to use it in the rain). Type III anodized aluminum / stainless steel - I really don't know much in this area. Waterproofing is not necessary but can be a nice touch.
- Flood/Throw: I prefer a more floody light. But it could be a very nice addition to have a flood-to-throw mechanism.
- Price: I prefer less than 20$, but can live with 30$ or even 40$ if it's really worth it.