If you do it outside good old sunlight is just fine if you want to grow indoors any LED grow light should be sufficient although tomatoes do like a lot of light so you may need a few of them if you decide to go with indoor growing.
You also want to make sure that as little light as possible gets down into the bucket of water to avoid stuff like algae growth. But that’s a simple as wrapping your bucket in some nice cheap tin foil keeps the light out, helps keep the water temperature stable, and even reflect some light back up to your plant so that it can get more
Hmm. I have two sets of tall, double-windows in one room, and thinking I could probably find an at m aerator/pump/tubing by yard sale or thrifting. I may not be able to pull it all together in time this winter, because I’m rural without my own transportation atm, but I bet I’m be able to find it before next winter. That’s really a good idea with the foil and enough detailed instructions to get it done! Thanks so much for taking the time to type all that out for me, friend. Wishing you abundance in your endeavors, and thank you again.