Inspired by the model “Christmas Tree (1913982) with LED candle base” i made this from scratch in Fusion 360. 

I wanted a smother base and a tree model for the spiral vase mode. 

Also you can optionally add 6x3 mm magnets, to let the tree and base snap together (very satisfying). Two magnets (one for the tree, one for the base) are sufficient in my opinion, but you can add up to 10 (5 for the tree, 5 for the base). I glued them with super glue.

The hole for the tea light has a diameter of 37.5 mm.

Instructions

Tree.stl: 

• print in vase mode!
• optimized for transparent PETG, i didn't tested other materials 
• i printed with 4 bottom layers, the more layers you choose the more contact area for the magnets will be there

Base.stl:

• print in normal mode
• material type does not matter

Cad files are attached. Feel free to fit the model to your needs.

The original model of the tree is from https://www.thingiverse.com/thing:1913982.