That said, I do think they're adorable, and would love if more would hang out in my garden. Sadly not likely, since it's on the roof of a building in a city.
Seriously though, what would be wrong with just going back to the controlled burn scheme of the past? If it worked for 50k years, maybe you should give it a shot again on its own before trying wacky schemes with a centuries of failed history behind them?
That's not to say that this isn't an awesome attempt. Just don't try to call it something it isn't.
I think some diode lasers use a third option, where an electron doesn't fall to a lower energy level within an atom, but to a low energy hole on the opposite side of the semiconductor. I could easily be wrong about that, though.
(Everything I know, I learned from NPR. Blame them if I'm misunderstanding something.)