[TheSpiceIsLife]

For actual sunlight, where only 45% of the light is in the photosynthetically active wavelength range, the theoretical maximum efficiency of solar energy conversion is approximately 11%. In actuality, however, plants do not absorb all incoming sunlight (due to reflection, respiration requirements of photosynthesis and the need for optimal solar radiation levels) and do not convert all harvested energy into biomass, which results in a maximum overall photosynthetic efficiency of 3 to 6% of total solar radiation.

https://en.m.wikipedia.org/wiki/Photosynthetic_efficiency

[jonahbenton]

Thanks! Lots of room for engineered improvement!

[dylan604]

Of the plants?