condition mean min max 4 h after light 9.333102 7.747797 10.918407 8 h after light 9.756452 9.674439 9.838465 12 h after light 9.086378 8.767895 9.404861 4 h after dark 9.0324775 8.660094 9.404861 8 h after dark 10.1032015 9.838465 10.367938 12 h after dark 8.534607 8.534607 8.534607