So, let's get to it:
Description: The light is small. It's a mere 57mm in length. Seriously, you could accidentally swallow the thing. I've seen pills bigger than this light.
- It's damn bright. Held horizontal to the ground, it does seem to be 170 lumens or thereabouts.
- Held horizontal, it does fade to lower brightness (documentation says 20 lumens).
- It's presumably got a medium setting for a medium position between horizontal and vertical. It's too bright right now to tell if that's the case, but I assume it is.
- Activation is done by twisting the head. I kind of hate that, 'cause lights like this tend to accidentally activate when in my pocket, killing the battery.