Light without electricity? Glowing algae could make it possible

This feels like weird framing. They still need energy to produce it.

I have a genetically engineered luminescent petunia plant. It’s neat, but a ways off from being useful for anything.

It rather resembles the CGI protomolecule from 'The Expanse'.

So can torches and candles.

Why all the bother with 3d-printed gel shapes? Why not just use a mat of these things, all glowing, and then put it behind an LCD panel. Then you can have moving pictures without all the bother of 3d printing.

Then you can take the next step and both their apparent output further by replacing the algae with tiny blue LED modules.

good for car dashboards, maybe for not vital areas