condition mean min max 4 h after light 1.26635 1.26143 1.27127 8 h after light 1.70024 1.69645 1.70403 12 h after light 1.365875 1.17783 1.55392 4 h after dark 1.6600000000000001 1.50906 1.81094 8 h after dark 1.936105 1.92754 1.94467 12 h after dark 1.51464 1.14871 1.88057