condition mean min max 4 h after light 4.5 4.5 4.5 8 h after light 17.3 4.2 30.4 12 h after light 5.15 5.0 5.3 4 h after dark 6.35 4.1 8.6 8 h after dark 9.899999999999999 8.1 11.7 12 h after dark 12.2 10.7 13.7