condition mean min max 4 h after light 42.3 42.3 42.3 8 h after light 6.05 2.1 10.0 12 h after light 38.8 34.1 43.5 4 h after dark 21.0 19.4 22.6 8 h after dark 31.75 30.8 32.7 12 h after dark 17.3 7.6 27.0