For photovoltaic cells there are other factors which limits this further. For a single p-n junction the limit is around 33% for normal sunlight[1], though it's

For photovoltaic cells there are other factors which limits this further. For a single p-n junction the limit is around 33% for normal sunlight[1], though it's too early in the morning for me to calculate it at the proposed ~2700K temperature. By stacking junctions you can get higher but then other things kick in[2]. [1]: https://en.wikipedia.org/wiki/Shockley%E2%80%93Queisser_limit https://en.wikipedia.org/wiki/Shockley%E2%80%93Queisser_limi... [2]: https://en.wikipedia.org/wiki/Solar-cell_efficiency#Factors_affecting_energy_conversion_efficiency https://en.wikipedia.org/wiki/Solar-cell_efficiency#Factors_...