There are a lot of problems with this that have been outlined in all these comments, and 99% are true.
I would instead take advantages of photoautrophic organisms that already are bioluminescent like Dinoflagellate.
https://en.wikipedia.org/wiki/Dinoflagellate
They can have a startling effect in large numbers and feed themselves with daylight.
https://en.wikipedia.org/wiki/Bioluminescence#mediaviewer/Fi...
Some video of their effect