I cant remember the company name but they do fiber optic sun lights that tracks the sun. No big holes in the roof and you can run the cables anywhere you want, within reason.
Hydrogen peroxide or h2o2. My bubbles splash enuff to keep the cuts wet so I don't submerge them. But I use plugs mostly. Less moving parts. I give them a squirt every few days and 9 to12 days later, roots.