condition mean min max 4 h after light 0.0 0.0 0.0 8 h after light 0.0 0.0 0.0 12 h after light 0.072703 0.0 0.145406 4 h after dark 0.03177305 0.0 0.0635461 8 h after dark 0.0477671 0.0 0.0955342 12 h after dark 0.0 0.0 0.0