You can use any light you want, I have used a led with battery
Best choice: https://www.amazon.com/StillCool-Submersible-Waterproof-Underwater-Decorative/dp/B01G53LS06/ref=sr_1_54?dchild=1&keywords=led+battery&qid=1606580183&sr=8-54
If you have any questions, feel free to ask! Follow me, more to come soon! h
3D PRINTING SETTINGS 0.12 mm infill: 0 wall lines count: 99 filament used: UltraFuse PLA white speed 30mm/s brim: yes rafts: no Supports: no