About this 3D model
This is a holder for 3 bulbs, you can slide the base into the hole and then put a socket in it. There are 3 small hooks in order to be able to hook the support to a net. For a E27 cap the diameter of the bulb holder must be 20 cm. The radius must be around 20 cm (see photo). A filling of 17% is sufficient. A speed around 40 mm/s. Support required.