condition mean min max 4 h after light 5.21955 4.25418 6.18492 8 h after light 9.14032 8.99498 9.28566 12 h after light 10.431799999999999 10.1269 10.7367 4 h after dark 11.272666666666666 10.923 11.9583 8 h after dark 8.841766666666667 8.46785 9.09118 12 h after dark 6.480243333333333 5.4961 7.4478