condition mean min max 4 h after light 2.477905 2.31148 2.64433 8 h after light 2.487445 2.22033 2.75456 12 h after light 3.330085 3.14023 3.51994 4 h after dark 4.3157250000000005 3.86681 4.76464 8 h after dark 3.60099 3.29981 3.90217 12 h after dark 3.56 3.144 3.976