condition mean min max 0 h after light 1.818665 1.69903 1.9383 4 h after light 2.673645 2.50826 2.83903 8 h after light 3.100415 3.05625 3.14458 4 h after dark 3.2786049999999998 3.15293 3.40428 8 h after dark 2.81538 2.76729 2.86347 12 h after dark 1.316295 1.3018 1.33079