This is a landscape light bollard that can be connected to landscape light power lines. Based on the parts listed, this will need to be 11v DC or AC. These are similar to a lot of very expensive options you can find online, but you can print these for around $10 USD each.

Notes:

• The body piece is 250mm tall, meaning it is meant for printers with at least 250mm of Z height.
• For some reason I couldn't indicate that non-printed parts are needed without selecting items from the Bambu store, but they didn't have the necessary parts. Here's what you'll need:
  • 3W G4 LED Bulbs - https://amazon.com/gp/product/B01C8J7U3U/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1
  • G4 LED Bulb Socket - https://www.amazon.com/gp/product/B07CXL6MLD/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1
  • Landscape Lighting Wire Connector Outdoor - https://www.amazon.com/gp/product/B083NGFDXQ/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Instructions:

• Printing:
  • Material: PETG, ASA, or some other outdoor UV-resistant matrial is recommended. I used PETG.
  • Colors: You can use whatever color you want for the body and the very top, but you'll need transparent filament for the diffuser.
  • Special instructions:
    • 3mf: If you're using the 3mf in Bambu slicer, then you'll notice height modifiers on the top piece. The first 30 mm will be the body color, but after that it's the diffuser. I have it set so you'll get a bit of transparency, but still some opacity. If you want to make it more glassy, I would recommend changing the settings in the layer height modifier that's in the range of 30.2 to 105 to be 0.1 mm layer height, and possibly even reducing the speeds to 10 mm/s down from 20. This will add a lot of print time though.
    • STLs: The body piece can be printed with default settings. The top piece (the part with the diffuser) will need a settings change at 30.2mm up through 105mm and apply the following changes:
      • Change to transparent filament
      • Patterns: Aligned Rectilinear
      • Speed: 20mm/s (or 10mm/s if you want to make the diffuser more glassy)
      • Another option to improve transparency if you like is to set layer height to 0.1
• Assembly:
  • Insert the leads from the G4 bulb socket into the holes inside the inset part on top of the body and push them through to the bottom where they can be pulled through.
    Note: the socket does not fit tightly, so if you want to make it more stable, some hot glue will help
  • Add some hot glue to where the wires come out at the bottom just to keep gunk out of there.
  • Insert the G4 bulb into the socket
  • Push the top piece into the cutout on top of the body piece. It's meant to be a tight fit, so there isn't much clearance. Some sanding might be required depending on the accuracy of your printer.
• Installation: From here, it should be no different to how landscape lights are normally installed. Connect the wire connectors to the power line, use them to connect the leads from the bollard, and then push the spike of the bollard into the ground.