condition mean min max 4 h after light 3.3 3.3 3.3 8 h after light 3.2 2.2 4.2 12 h after light 2.25 1.1 3.4 4 h after dark 17.75 3.3 32.2 8 h after dark 7.0 5.0 9.0 12 h after dark 13.350000000000001 12.8 13.9