condition mean min max 0 h after light 3.85175 3.50983 4.19367 4 h after light 2.499295 2.43401 2.56458 8 h after light 2.53032 2.52091 2.53973 4 h after dark 5.432725 5.3912 5.47425 8 h after dark 5.146065 4.91447 5.37766 12 h after dark 3.5391250000000003 3.52637 3.55188