condition mean min max 4 h after light 3.9 3.9 3.9 8 h after light 13.200000000000001 6.3 20.1 12 h after light 5.95 3.4 8.5 4 h after dark 10.45 2.0 18.9 8 h after dark 9.450000000000001 2.3 16.6 12 h after dark 7.75 5.2 10.3