condition mean min max 4 h after light 5.0 5.0 5.0 8 h after light 2.0 1.7 2.3 12 h after light 2.25 1.6 2.9 4 h after dark 5.449999999999999 4.6 6.3 8 h after dark 3.4000000000000004 3.2 3.6 12 h after dark 3.65 2.0 5.3