condition mean min max 4 h after light 3.9 3.9 3.9 8 h after light 3.55 3.4 3.7 12 h after light 10.35 8.5 12.2 4 h after dark 7.8999999999999995 4.6 11.2 8 h after dark 9.05 3.2 14.9 12 h after dark 3.05 2.7 3.4