condition mean min max 0 h after light 3.4450000000000003 3.34964 3.54036 4 h after light 3.23756 2.33811 4.13701 8 h after light 6.7447099999999995 4.53821 8.95121 4 h after dark 9.48271 8.79172 10.1737 8 h after dark 5.0561050000000005 4.68827 5.42394 12 h after dark 2.551295 1.96423 3.13836