condition mean min max 4 h after light 4.6902 2.32915 7.23077 8 h after light 3.1995816666666665 0.911805 5.58355 12 h after light 3.665713333333333 2.12694 5.8947 4 h after dark 6.345343333333333 4.07121 8.39894 8 h after dark 6.13602 3.80451 7.40145 12 h after dark 7.3021899999999995 5.99484 9.48368