I've created my own vintage ceiling hanging bulbs light fitting and needed some hooks for the ceiling. See the photo in the post for an example of the type of fitting I mean - I don't have photos of the finished project yet.
The photo in this post is an example only
The hooks on the market all needed 2 screws to fasten into the ceiling which I didn't want. So I went about designing a hook that could be fitted to the ceiling and supported with one screw. I am only hanging a very, very small weight on these, around 200 grammes.
The hole in the bottom is to get your screwdriver through and I will then put a cable tie through to secure the wire in place. I've included a version with just a collared hole and one with a collared keyhole hole. The keyhole hole is great if you're using a very long screw that can't be slotted within the hook.