condition mean min max 0 h after light 8.20419 8.05459 8.35379 4 h after light 11.81005 10.4685 13.1516 8 h after light 43.166349999999994 41.7887 44.544 4 h after dark 35.8692 30.2532 41.4852 8 h after dark 20.9769 19.5465 22.4073 12 h after dark 10.024885 7.83407 12.2157