condition mean min max 0 h after light 1.739687 0.464634 3.01474 4 h after light 2.781965 2.36292 3.20101 8 h after light 6.018295 3.77701 8.25958 4 h after dark 7.07131 5.4878 8.65482 8 h after dark 5.50267 5.06705 5.93829 12 h after dark 2.3888335 0.926367 3.8513