I designed a storage tower for bambu reusable spools that doubles as a light source. Print as many rings as you need to store as many spools as you want (there's probably a limit to this at some point). The base is designed for an E27/E26 lamp holder and 5W LED bulbs. I wouldn't recommend anything stronger or larger as it won't fit and the heat may cause issues. At 5W, I have tested this lamp for 16 hours of continuous usage with no issues. It takes around 250 g of filament to build the tower 4 layers high.

Material: PLA or PETG

Layer Height: .02

Supports: Needed for the base, I also used them on the base ring and middle rings but may not be necessary.