Fully automatic bulb assembly production line 3D model is available on CGTrader for $29. Original author: chanway2012.
PDF (PDF, filesize: 20 MB), IGE (IGES, filesize: 591 MB), SLDPRT (SolidWorks, filesize: 367 MB), STP (STEP, filesize: 328 MB), MAX (Autodesk 3ds Max, filesize: 2.83 GB)