condition mean min max 4 h after light 1.74576 1.62689 1.86463 8 h after light 2.16167 1.84888 2.47446 12 h after light 2.73376 2.64036 2.82716 4 h after dark 5.217245 4.44256 5.99193 8 h after dark 3.616355 3.43467 3.79804 12 h after dark 3.10498 2.94514 3.26482