condition mean min max 4 h after light 41.8 41.8 41.8 8 h after light 31.0 2.8 59.2 12 h after light 16.1 4.4 27.8 4 h after dark 18.75 6.4 31.1 8 h after dark 19.05 14.8 23.3 12 h after dark 19.2 15.7 22.7