condition mean min max 4 h after light 5.7 5.7 5.7 8 h after light 2.1 1.5 2.7 12 h after light 1.55 1.5 1.6 4 h after dark 3.95 3.0 4.9 8 h after dark 4.199999999999999 3.3 5.1 12 h after dark 3.4000000000000004 2.6 4.2