My son has a soft egg light that we use for reading, sometimes at night, etc.
We already have a Skadi wall in his bedroom, so I created this holder so the light has a good place.
Use M2x16mm screws and printed T-slot bracket https://makerworld.com/en/models/52498?from=search#profileId-54272.
If you use countersunk screws, they will be flush with the wall.