condition mean min max 4 h after light 45.2 45.2 45.2 8 h after light 47.05 32.4 61.7 12 h after light 61.0 57.2 64.8 4 h after dark 15.05 11.6 18.5 8 h after dark 36.75 5.1 68.4 12 h after dark 10.7 10.2 11.2