I think efficiency of plants, but that's measure from light to sugar that is a good long term storage material. Solar panels get 20% but you get electricity tha

I think efficiency of plants, but that's measure from light to sugar that is a good long term storage material. Solar panels get 20% but you get electricity that is difficult to store. Some plants have slightly better efficiency https://en.wikipedia.org/wiki/C4_carbon_fixation https://en.wikipedia.org/wiki/C4_carbon_fixation but not too much. I think you linked an article about red algae. I took a look and I think they are counting the efficiency in a strange way to claim "almost 100%". Probably almost 100% in the first step of capturing the energy, not in the complete process to transform it into something useful. (And probably using only monochrome light, but I can't understand the details)