condition mean min max 4 h after light 83.5 83.5 83.5 8 h after light 30.15 9.4 50.9 12 h after light 25.55 13.4 37.7 4 h after dark 10.0 9.6 10.4 8 h after dark 36.2 8.4 64.0 12 h after dark 29.25 8.0 50.5