condition mean min max 4 h after light 0.7641125 0.69853 0.829695 8 h after light 1.323345 1.2004 1.44629 12 h after light 2.3661849999999998 2.14501 2.58736 4 h after dark 2.87723 2.49271 3.26175 8 h after dark 2.077475 2.05954 2.09541 12 h after dark 1.4560499999999998 1.39465 1.51745