condition mean min max 4 h after light 7.88916 6.1387 9.63962 8 h after light 12.3458 11.8899 12.8017 12 h after light 10.67716 9.25322 12.1011 4 h after dark 15.8462 14.7693 16.9231 8 h after dark 10.90145 9.5185 12.2844 12 h after dark 11.640550000000001 11.3713 11.9098