condition mean min max 0 h after light 2.453355 1.04834 3.85837 4 h after light 1.852515 1.37526 2.32977 8 h after light 3.693485 2.45145 4.93552 4 h after dark 4.46753 3.55118 5.38388 8 h after dark 2.56094 2.32468 2.7972 12 h after dark 2.60008 2.55405 2.64611