condition mean min max 4 h after light 4.0 4.0 4.0 8 h after light 25.5 9.5 41.5 12 h after light 50.3 39.7 60.9 4 h after dark 6.800000000000001 4.3 9.3 8 h after dark 20.1 11.8 28.4 12 h after dark 10.0 3.0 17.0