condition mean min max 4 h after light 10.1 10.1 10.1 8 h after light 26.05 24.1 28.0 12 h after light 6.1 5.6 6.6 4 h after dark 5.75 5.0 6.5 8 h after dark 6.4 5.0 7.8 12 h after dark 16.85 4.9 28.8