- No dimming, unless they're talking about using an LED compatible dimming light switch.
- Yes, there is enough friction to keep the light stable.
- Pivots are all controlled by a 5mm allen wrench. I keep the joints very tight, but I bring the light to bear on the inside of a bowl with a minor yank. Occasionally, I'll re-tighten, but it does the job well. I don't move the light a lot, it's aimed at the inside of a bowl. I keep a full set of allen wrenches nearby, its seems I use them all the time.
- Base is strong enough to hang sideways on the wall (zoom in on photo, it's screwed to the corner of the pegboard frame)