To be sure, lighting an average room demands far, far more energy. Rather, I'm thinking more like grass-roof huts where roads are exclusively ruts from foot tra

To be sure, lighting an average room demands far, far more energy. Rather, I'm thinking more like grass-roof huts where roads are exclusively ruts from foot traffic. In this case, you're racing to beat something approaching pitch black (on new moons), and where even a soft glow is a welcome improvement. Nothing to read or socialize by, though this could be a stepping stone towards realizing a plant that does (one can still dream, I hope)!