anchorplaster
I'm installing a track light on the ceiling.
The ceiling is old plaster (~1945)
The fixtures come with what I can tell are self-drilling anchors.
Is it a good idea to use these anchors on plaster ceiling,
or should I use something else?
The weight load on each anchor should be fairly low (1-2 lbs is my best guess)
so I suppose I could use any plastic-sleeve anchors, predrill the holes,
and it should do minimal damage to plaster.
Ideally this should be screwed/anchored into a joist for maximum support. However, if you really want to use a drywall anchor, you should use a toggle bolt or a ceiling anchor. Instead of just screwing into the wall, these expand to several times their size which gives you a good hold, especially when the force is pulling directly down. 10lbs might be pushing it though, it will depend on the thickness of your drywall and the overall condition. The worst case is you just have to patch the hole and repaint; drywall is pretty forgiving like that!
Typically you would remove them, however the anchor you are using is marketed as a "stud solver" meaning that it can be driven into a stud. I think it is fine to leave them.
If you were using small plastic drywall anchors then I'd definitely remove them and drive a screw directly into the stud.
Best Answer
This will most likely not work because you won't be able to get this to screw into the plaster. That stuff is HARD. I use masonry drill bits in my house, and they go dull after just a few holes drilled.
You will probably be OK using wall anchors as far as the anchor holding your light, but I would go with a different style instead, like the expanding plug, or toggle bolt type.