I made this so I use some solar landscape lights on a fence rail & post.
The plate is pressure fitted into the groove.
Print in ASA or similar filament
Res: 2
Infill: 20
Walls: 8
Print Time: 2 Hours
Lights I used are: https://amzn.to/432jYxq
Lights are 4.5", so the plate should fit many other styles as long as they have that groove around the base. I used two 1" drywall screws to mount to fence.
Note:
Ground Light Plate-Old Style: Will fit lights with No Tabs.
Ground Light Plate-New Style: Will fit both models, but will be a little loose on No Tab lights.
Look at last 2 pictures for details.