condition mean min max 4 h after light 20.8 20.8 20.8 8 h after light 22.6 18.2 27.0 12 h after light 31.0 2.5 59.5 4 h after dark 37.75 29.9 45.6 8 h after dark 11.95 9.8 14.1 12 h after dark 47.5 37.4 57.6