condition mean min max 4 h after light 618.1 618.1 618.1 8 h after light 539.9 433.0 646.8 12 h after light 374.95 322.4 427.5 4 h after dark 330.45000000000005 276.8 384.1 8 h after dark 456.35 419.1 493.6 12 h after dark 463.8 415.5 512.1