condition mean min max 4 h after light 25.1 25.1 25.1 8 h after light 2.2 2.1 2.3 12 h after light 1.6 1.6 1.6 4 h after dark 4.25 1.8 6.7 8 h after dark 4.25 3.6 4.9 12 h after dark 3.3 2.1 4.5