condition mean min max 4 h after light 2.97393 2.80168 3.14618 8 h after light 4.776095 4.69714 4.85505 12 h after light 5.382505 4.93722 5.82779 4 h after dark 11.001966666666666 10.7181 11.4168 8 h after dark 8.227916666666665 7.8561 8.52827 12 h after dark 6.3598 5.49217 7.58205