condition mean min max 4 h after light 1.92902 1.8899 1.96814 8 h after light 1.16885 1.02877 1.30893 12 h after light 0.9615485 0.666647 1.25645 4 h after dark 2.092527 0.835554 3.3495 8 h after dark 2.083765 1.69102 2.47651 12 h after dark 2.66448 1.6796 3.64936