condition mean min max 4 h after light 13.9 13.9 13.9 8 h after light 14.05 11.5 16.6 12 h after light 21.5 16.0 27.0 4 h after dark 26.95 14.9 39.0 8 h after dark 38.75 16.3 61.2 12 h after dark 21.25 13.5 29.0