Oh, this is fun tech, but it’s more of a toy than actually useful.

I had a tour with a Dutch company who does something similar, and they told me they were hoping to build up to a quarter of a watt per square meter. With a big downside being that it requires anaerobic soil, and healthy bacteria, so basically anything that’s not a warm, muddy swamp is a no go.

A quarter watt will provide power for a single LED about as bright as a modern candle, which is what they used it for at the demo site, lighting up the edges of a path with fiber optic strands with an LED.