A double helix pedestal designed to hold LED candles / tealight candles. Scale in your slicer to whatever size you prefer, although be careful about making it too small as it increases the difficulty of printing the helix.
I used Autodesk Fusion 360 to design this thing. First I created a coil, then I rotated the coil 180 degrees around the Z axis and checked "create a copy" and set the type of operation to "join". After that I created a pedestal like sketch between the double helix and revolved that around the Z axis to create the pedestal.