condition mean min max 4 h after light 8.5 8.5 8.5 8 h after light 8.75 4.7 12.8 12 h after light 16.2 3.4 29.0 4 h after dark 14.5 14.2 14.8 8 h after dark 11.100000000000001 2.1 20.1 12 h after dark 9.75 6.9 12.6