4 triangles	Assembly of 4 triangles with 12 clips. 1) Lay 4 triangles flat and clip them (fig.1). 2) Insert the socket and the bulb. 3) Flip the assembly (the clips are on the outside of the lamp) 4) Clip A to A, B to B and C to C.
25 x 22,5 x 23,5 cm

You can use a pencil  to mark the triangles with letters and then erase the marks when the lamp is done.
Fold the sidebands into a 90° angle before you start building the lamp.