condition mean min max 4 h after light 6.1 6.1 6.1 8 h after light 10.8 7.3 14.3 12 h after light 9.5 6.1 12.9 4 h after dark 9.05 6.7 11.4 8 h after dark 3.9499999999999997 3.3 4.6 12 h after dark 7.800000000000001 7.3 8.3