Use CAD software (such as AutoCAD, SolidWorks, etc.) to create a 3D model of the bulb and design the shell and internal structure. Export the design to STL or OBJ format for easy recognition by 3D printers. Select the appropriate printing material based on the bulb design, such as PLA, ABS or resin. Use slicing software such as Cura or PrusaSlicer to convert the 3D model to G-code and set print parameters such as height and fill rate. After printing, remove the support structure and sand and clean the bulb to ensure a smooth surface. Install the internal components of the bulb (e.g., LED lights, wires) into the printed housing. The bulb made of ABS filament is complete.