condition mean min max 4 h after light 67.0 67.0 67.0 8 h after light 5.05 2.6 7.5 12 h after light 9.55 7.9 11.2 4 h after dark 9.200000000000001 2.6 15.8 8 h after dark 30.299999999999997 20.7 39.9 12 h after dark 13.75 7.9 19.6