This is a lamp based on the design of a real SUP-board.
If you only want to have the board itself you need to print SUP, SUP_Fin and SUP_Plug.
If you want to use it as a lamp you need everything but the plug used to seal the end.
Note the height of approximate 33cm, which is too much for most small printers.
I used M3x6mm screws to screw in the bottom plate und used a cheap 5V LED-stripe to illuminate the board from below.
Look at https://www.thingiverse.com/thing:2965219 for a paddle.
Check out https://www.thingiverse.com/thing:2860317 for a small keychain version.
Feel free to ask for further informations should any questions arise.
Print SUP in Vasemode without bottom layers with small layerheight, especially near the tip.
Everything else can be printed as usual.
I modelled it using the "Solid" Workspace in Fusion 360, but it was one of my harder designs with a design time of at least 15h. It was fun, but it took some creative thinking to solve the curvature in more than one dimension.
First step was to trace the top-down outline from a photo, then I traced it from the side, making small adjustments to all angles to allow it to be printed in vase mode. Then I combined both sides into simple faces that I connected with a face loft. I made the embossed features by unfolding a reference sheet with the sheet metal workspace, tracing the original patterns and then bending it back and combining both bodies.
The socket was easy and straight-forwards in comparison, I only needed to use the board as a cutting tool for the base model and adjust some clearances to allow it to snap into it.
I am sure there are better ways to design it, my design history is cluttered with wrong attempts, but this should at least point you into the right direction.
Feel free to ask me if anything is unclear.