condition mean min max 4 h after light 9.8 9.8 9.8 8 h after light 44.4 37.8 51.0 12 h after light 38.0 31.8 44.2 4 h after dark 17.45 4.8 30.1 8 h after dark 16.8 4.4 29.2 12 h after dark 5.15 2.7 7.6