Step 1 : Build Lamp desk footer with grey mortar/cement from a used plastic box in the desired size/aspect. Make a hole in the box where you would need to fix a screw in order to attach the wooden lamp arm.
Step 2 : Take a wood cleat and cut into seven pieces.
Three piece with a length of 4cm to build your bottom “U” which will link your concrete footer and wooden arm.
Three piece with a length around 30cm which will define the main part for the wooden Lamp arm. Make a hole for screw.