20 triangles	Assembly of 20 triangles with 60 clips 1) Lay 20 triangles flat and clip them (fig.3). 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, C to C and so on.
67,5 x 27,5 x 27,5 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.