condition mean min max 4 h after light 5.2 5.2 5.2 8 h after light 16.2 5.3 27.1 12 h after light 11.55 2.1 21.0 4 h after dark 4.949999999999999 4.8 5.1 8 h after dark 18.75 3.7 33.8 12 h after dark 10.25 5.3 15.2